Replace set-output by $GITHUB_OUTPUT (#20547)

* remove set-output

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

.github/workflows/self-push-caller.yml

@@ -32,7 +32,7 @@ jobs:
           run: |
             for file in ${{ steps.changed-files.outputs.all_changed_files }}; do
               if [ `basename "${file}"` = "setup.py" ]; then
-                echo ::set-output name=changed::"1"
+                echo "changed=1" >> $GITHUB_OUTPUT
               fi
             done