add new changelog to the top

.github/workflows/release.yml

@@ -60,10 +60,12 @@ jobs:
 
       - name: Update CHANGELOG.md
         run: |
-          echo "     " >> CHANGELOG.md
+          EXISTING_CHANGELOG=$(cat CHANGELOG.md)
+          echo "     " > CHANGELOG.md
           echo "## ${{ steps.nextversion.outputs.NEXT_VERSION }}" >> CHANGELOG.md
           echo "* ${{ github.event.pull_request.title }}" >> CHANGELOG.md
           echo "     " >> CHANGELOG.md
+          echo -e "$EXISTING_CHANGELOG" > CHANGELOG.md
 
       - name: Commit changes
         run: |