Fix assertion bug in remote executor and update notes

Fixed a state management bug in the coordinator that caused assertions to stop running on remote workers. Updated known issues section to reflect the correct version for the fix.

Author: jayacryl

docs/managed-datahub/release-notes/v_0_3_15.md

@@ -31,6 +31,9 @@ This contains detailed release notes, but there's also an [announcement blog pos
 
 - Elasticsearch 7: Fix role creation
 - Elasticsearch/Opensearch: Allow role to inspect nodes for query optimization
+- **Assertions on remote executor**: There was a state management bug in the coordinator on `3.15-acryl` which caused assertions to stop running on remote workers. This infrastructure bug has been fixed and tested for to prevent future regressions.
+
+
 
 ### v0.3.15-acryl
 
@@ -67,6 +70,7 @@ Fixes:
 
 ## Known Issues
 
-- Assertions do not run on remote executor deployment modes. Please look to 3.15.3 for the fix.
+- Assertions do not run on remote executor deployment modes. Please look to 3.15.4 for the fix.
+- There is some backward incompatibilities between older remote executors and 3.15 GMS. Remote executors may need to be upgraded to resolve these.
 - PATCH of the Ownership aspect does not support assigning the same owner to multiple ownership type urns
 - If you were to upgrade to v0.3.15 and create a "Platforms" home page module, in order to roll back to a previous version of DataHub you will need to either (1) remove the Platforms modules from all home page templates or (2) roll back to v0.3.14.2 which includes a fix to handle unknown module types. This sort of backwards compatibility with home page modules is resolved going forward with v0.3.15.