[Internal] Add Release tag and Workflow Fix (#972)

## Changes
Add release tag

## Tests
<!-- 
How is this tested? Please see the checklist below and also describe any
other relevant tests
-->

- [ ] `make test` passing
- [ ] `make fmt` applied
- [ ] relevant integration tests applied

.codegen/changelog_config.yml

@@ -7,5 +7,8 @@ change_types:
     tag: "[Doc]" 
   - message: Internal Changes
     tag: "[Internal]"
+  # Does not appear in the Changelog. Only for PR validation.
+  - message: Release
+    tag: "[Release]"
   # Default for messages without a tag
   - message: Other Changes

.github/workflows/push.yml

@@ -88,9 +88,9 @@ jobs:
       - name: Validate Tag
         run: |
           TAG=$(echo ${{ github.event.pull_request.title }} | sed -ne 's/\[\(.*\)\].*/\1/p')
-          if grep -q "tag: \"[$TAG]\"" .codegen/changelog_config.yml; then 
+          if grep -q "tag: \"\[$TAG\]\"" .codegen/changelog_config.yml; then 
+            echo "Valid tag found: [$TAG]"
+          else 
             echo "Invalid or missing tag in commit message: [$TAG]" 
             exit 1
-          else 
-            echo "Valid tag found: [$TAG]"
           fi