Remove --set-upstream

Author: amanmahajan7

.github/workflows/update-screenshots.yml

@@ -54,4 +54,4 @@ jobs:
           git config --global user.email "${{ env.AUTHOR_EMAIL }}"
           git add test/visual/__screenshots__/.
           git diff-index --quiet HEAD || git commit -m "${{ env.COMMIT_MESSAGE }}"
-          git push --set-upstream origin ${{ github.head_ref }}
+          git push