Add Software Supply Chain Best Practices v2 markdown

Signed-off-by: Marina Moore <[email protected]>

community/publications/README.md

@@ -28,6 +28,7 @@ This document lists all the publications and resources that TAG Security has pro
 | | OPA | Markdown | [Link](/community/assessments/projects/opa) |
 | | Spiffe-Spire | Markdown | [Link](/community/assessments/projects/spiffe-spire) |
 | **Supply Chain Security** | | | |
+| | Software Supply Chain Best Practices v2 | Markdown | [Link](/community/working-groups/supply-chain-security/supply-chain-security-paper-v2/SSCBPv2.md) |
 | | Software Supply Chain Best Practices | Markdown | [Link](/community/working-groups/supply-chain-security/supply-chain-security-paper/sscsp.md) |
 | | | PDF | [Link](/community/working-groups/supply-chain-security/supply-chain-security-paper/CNCF_SSCP_v1.pdf) |
 | | Evaluating your supply chain security | Markdown | [Link](/community/working-groups/supply-chain-security/supply-chain-security-paper/secure-supply-chain-assessment.md) |

community/working-groups/supply-chain-security/suply-chain-security-paper-v2/README.md

@@ -0,0 +1,14 @@
+# Software Supply Chain Best Practices v2
+
+## About
+This is an update to the Software Supply Chain Best Practices whitepaper that accounts for how the field has evolved.
+The paper adds descriptions of personas to help guide the reader to relevant parts of the paper, and updates descriptions of the software supply chain best practices.
+
+## Updates
+Minor updates (typo fixes, etc) will be accepted to the markdown version of this paper.
+
+Larger updates may be proposed, but may be pushed to a future version of the paper.
+
+## Markdown
+The [markdown](https://github.com/cncf/tag-security/blob/main/supply-chain-security/supply-chain-security-paper-v2/SSCBPv2.md) file is available in the repository.
+