Update release-notes-v2.1.0.md

Author: akshatsinha007

CHANGELOG/release-notes-v2.1.0.md

@@ -1,19 +1,14 @@
 ## v2.1.0
 
 ## Enhancements
-- feat: auto assign permission group (#6923)
+- feat: auto assign permission group ( https://github.com/devtron-labs/devtron/issues/6911 )
 ## Bugs
 - fix: prevent exposure of internal-only attributes in API responses and requests (#6917)
 - fix: append filtered cluster details to the cluster detail list in capacity handler (#6915)
 - fix: enhance cluster overview response with raw cluster capacity details and caching support (#6914)
 - fix: Handle cluster capacity fetch errors by returning detailed connection failure status (#6912)
 ## Others
-- misc: vendor files (#6927)
-- sync: Release candidate v0.45.0 (#6924)
-- chore: Update README with new platform description and links (#6921)
 - sync: main (#6920)
 - chore: Adds scarf pixel (#6918)
 - misc: add clientIP in audit log (#6908)
 - misc: Refactor vulnerability query implementation and cleanup unused code (#6907)
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