commit changelog before running release-pr

Author: paulbalaji

.github/workflows/rust-release.yml

@@ -59,6 +59,7 @@ jobs:
 
           # Stage CHANGELOG.md so release-plz includes it in the release PR
           git add CHANGELOG.md
+          git commit -m "update changelog"
 
           # Run release-plz to create/update the release PR
           release-plz release-pr --git-token "$GITHUB_TOKEN"