Only push README.md changes if there are changes

Author: filiptammergard

.github/workflows/main.yml

@@ -36,11 +36,13 @@ jobs:
       - name: Generate README
         run: |
           yarn gen-readme
-          git config --global user.name github-actions[bot]
-          git config --global user.email github-actions[bot]@users.noreply.github.com
-          git add README.md
-          git commit -m "Update README.md"
-          git push
+          if [[ `git status --porcelain` ]]; then
+            git config --global user.name github-actions[bot]
+            git config --global user.email github-actions[bot]@users.noreply.github.com
+            git add README.md
+            git commit -m "Update README.md"
+            git push
+          fi
 
       - name: "`yarn gen-readme` changes committed?"
         run: |