update rel notes for april release (#816)

update the release notes

RELEASENOTES.md

@@ -2,10 +2,10 @@
 
 ## Release 04-08-2024
 
-* Linux image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:<tbd>`
-* Windows image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:<tbd>`
-* TA image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:<tbd>`
-* cfg sidecar image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:<tbd>`
+* Linux image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.7-main-04-09-2024-82adbf97`
+* Windows image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.7-main-04-09-2024-82adbf97-win`
+* TA image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.7-main-04-09-2024-82adbf97-targetallocator`
+* cfg sidecar image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.7-main-04-09-2024-82adbf97-cfg`
 * Change log -
   * fix: Fix: For Arc, use a default value CloudEnvironment that customers can change for other clouds- https://github.com/Azure/prometheus-collector/pull/753
   * Upgrade: fluent-bit from 2.0.9 to 2.1.10 - https://github.com/Azure/prometheus-collector/pull/809
@@ -25,9 +25,9 @@
 ## Release 03-08-2024
 
 * Linux image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.6-main-03-08-2024-fd4f13cb`
-* Windows image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.6-main-03-08-2024-fd4f13cb-cfg`
+* Windows image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.6-main-03-08-2024-fd4f13cb-win`
 * TA image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.6-main-03-08-2024-fd4f13cb-targetallocator`
-* cfg sidecar image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.6-main-03-08-2024-fd4f13cb-win`
+* cfg sidecar image - `mcr.microsoft.com/azuremonitor/containerinsights/ciprod/prometheus-collector/images:6.8.6-main-03-08-2024-fd4f13cb-cfg`
 * Change log -
   * fix: Fix for yaml unmarshal bug for keepequal/dropequal - https://github.com/Azure/prometheus-collector/pull/753
   * fix: dollar fix for TA - https://github.com/Azure/prometheus-collector/pull/769