change the url path to point at main now that the default branch ha…

…s been renamed

README.md

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-[![codecov](https://codecov.io/gh/center-for-threat-informed-defense/attack-control-framework-mappings/branch/master/graph/badge.svg?token=PLVBGOUWMC)](https://codecov.io/gh/center-for-threat-informed-defense/attack-control-framework-mappings)
+[![codecov](https://codecov.io/gh/center-for-threat-informed-defense/attack-control-framework-mappings/branch/main/graph/badge.svg?token=PLVBGOUWMC)](https://codecov.io/gh/center-for-threat-informed-defense/attack-control-framework-mappings)
 
 # Security Control Framework Mappings to ATT&CK
 This repository contains security control framework mappings to MITRE ATT&CK® with supporting documentation and resources. These mappings provide a critically important resource for organizations to assess their security control coverage against real-world threats as described in the ATT&CK knowledge base and provide a foundation for integrating ATT&CK-based threat information into the risk management process. This work was developed by the [Center for Threat-Informed Defense](https://ctid.mitre-engenuity.org/) in collaboration with our participants.
@@ -7,17 +7,17 @@ This repository contains security control framework mappings to MITRE ATT&CK® w
 
 | ATT&CK Version | Mappings as XLSX (download) | ATT&CK Navigator Layers | STIX Data |
 |---|---|---|---|
-| [ATT&CK-v10.1](/frameworks/ATT&CK-v10.1/nist800-53-r4/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/master/frameworks/ATT%26CK-v10.1/nist800-53-r4/nist800-53-r4-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v10.1/nist800-53-r4/layers) | [STIX](/frameworks/ATT&CK-v10.1/nist800-53-r4/stix) |
-| [ATT&CK-v9.0](/frameworks/ATT&CK-v9.0/nist800-53-r4/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/master/frameworks/ATT%26CK-v9.0/nist800-53-r4/nist800-53-r4-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v9.0/nist800-53-r4/layers) | [STIX](/frameworks/ATT&CK-v9.0/nist800-53-r4/stix) |
-| [ATT&CK-v8.2](/frameworks/ATT&CK-v8.2/nist800-53-r4/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/master/frameworks/ATT%26CK-v8.2/nist800-53-r4/nist800-53-r4-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v8.2/nist800-53-r4/layers) | [STIX](/frameworks/ATT&CK-v8.2/nist800-53-r4/stix) |
+| [ATT&CK-v10.1](/frameworks/ATT&CK-v10.1/nist800-53-r4/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/main/frameworks/ATT%26CK-v10.1/nist800-53-r4/nist800-53-r4-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v10.1/nist800-53-r4/layers) | [STIX](/frameworks/ATT&CK-v10.1/nist800-53-r4/stix) |
+| [ATT&CK-v9.0](/frameworks/ATT&CK-v9.0/nist800-53-r4/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/main/frameworks/ATT%26CK-v9.0/nist800-53-r4/nist800-53-r4-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v9.0/nist800-53-r4/layers) | [STIX](/frameworks/ATT&CK-v9.0/nist800-53-r4/stix) |
+| [ATT&CK-v8.2](/frameworks/ATT&CK-v8.2/nist800-53-r4/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/main/frameworks/ATT%26CK-v8.2/nist800-53-r4/nist800-53-r4-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v8.2/nist800-53-r4/layers) | [STIX](/frameworks/ATT&CK-v8.2/nist800-53-r4/stix) |
 
 **NIST 800-53 Revision 5 Security Control Mappings**
 
 | ATT&CK Version | Mappings as XLSX (download) | ATT&CK Navigator Layers | STIX Data |
 |---|---|---|---|
-| [ATT&CK-v10.1](/frameworks/ATT&CK-v10.1/nist800-53-r5/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/master/frameworks/ATT%26CK-v10.1/nist800-53-r5/nist800-53-r5-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v10.1/nist800-53-r5/layers) | [STIX](/frameworks/ATT&CK-v10.1/nist800-53-r5/stix) |
-| [ATT&CK-v9.0](/frameworks/ATT&CK-v9.0/nist800-53-r5/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/master/frameworks/ATT%26CK-v9.0/nist800-53-r5/nist800-53-r5-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v9.0/nist800-53-r5/layers) | [STIX](/frameworks/ATT&CK-v9.0/nist800-53-r5/stix) |
-| [ATT&CK-v8.2](/frameworks/ATT&CK-v8.2/nist800-53-r5/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/master/frameworks/ATT%26CK-v8.2/nist800-53-r5/nist800-53-r5-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v8.2/nist800-53-r5/layers) | [STIX](/frameworks/ATT&CK-v8.2/nist800-53-r5/stix) |
+| [ATT&CK-v10.1](/frameworks/ATT&CK-v10.1/nist800-53-r5/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/main/frameworks/ATT%26CK-v10.1/nist800-53-r5/nist800-53-r5-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v10.1/nist800-53-r5/layers) | [STIX](/frameworks/ATT&CK-v10.1/nist800-53-r5/stix) |
+| [ATT&CK-v9.0](/frameworks/ATT&CK-v9.0/nist800-53-r5/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/main/frameworks/ATT%26CK-v9.0/nist800-53-r5/nist800-53-r5-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v9.0/nist800-53-r5/layers) | [STIX](/frameworks/ATT&CK-v9.0/nist800-53-r5/stix) |
+| [ATT&CK-v8.2](/frameworks/ATT&CK-v8.2/nist800-53-r5/) | [Spreadsheet](https://github.com/center-for-threat-informed-defense/attack-control-framework-mappings/raw/main/frameworks/ATT%26CK-v8.2/nist800-53-r5/nist800-53-r5-mappings.xlsx) | [Navigator Layers](/frameworks/ATT&CK-v8.2/nist800-53-r5/layers) | [STIX](/frameworks/ATT&CK-v8.2/nist800-53-r5/stix) |
 
 ## A Collaborative Approach