Added a action to generate release notes

.github/workflows/release.yml

@@ -29,6 +29,17 @@ jobs:
           echo "version=$version" >> $GITHUB_OUTPUT
           echo "Found version $version from lib/vmpooler/version.rb"
 
+      - name: Generate Release Notes
+        uses: docker://githubchangeloggenerator/github-changelog-generator:1.16.2
+        with:
+          args: >-
+            --since-tag ${{ steps.cv.outputs.result }}
+            --future-release ${{ steps.nv.outputs.version }}
+            --output release-notes.md
+            --release-branch main
+        env:
+          CHANGELOG_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Tag Release
         uses: ncipollo/release-action@v1
         with: