ci: Make auto-commit step resilient to concurrent pushes

The stefanzweifel/git-auto-commit-action does not pull or rebase before
pushing (this is a deliberate non-goal upstream). When this workflow
runs concurrently with other actors pushing unrelated changes to main
(e.g. a different folder), the action's internal git push is rejected
as non-fast-forward and the workflow fails — even though the changes
do not conflict.

Switch to skip_push and add a small retry loop that does git pull
--rebase between push attempts, mirroring the pattern already proven
in the EngineeringKiosk/podcast-metadata workflows.

Author: andygrunwald

.github/workflows/update-readme.yml

@@ -20,13 +20,33 @@ jobs:
           template: "templates/README.md.tpl"
           writeTo: "profile/README.md"
 
-      - uses: stefanzweifel/git-auto-commit-action@v7.1.0
+      - name: Commit changes
+        id: auto-commit
         if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request'
+        uses: stefanzweifel/git-auto-commit-action@v7.1.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           branch: main
           commit_message: "chore: Update generated README"
           commit_user_name: "GitHub Actions Bot"
           commit_user_email: "actions@github.com"
-          commit_author: "GitHub Actions Bot <actions@github.com>"
+          commit_author: "GitHub Actions Bot <actions@github.com>"
+          skip_push: true
+
+      - name: Push changes with retry
+        if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request' && steps.auto-commit.outputs.changes_detected == 'true'
+        run: |
+          max_retries=3
+          for attempt in $(seq 1 $max_retries); do
+            echo "Push attempt $attempt of $max_retries"
+            if git push origin main; then
+              echo "Push succeeded on attempt $attempt"
+              exit 0
+            fi
+            echo "Push failed, pulling with rebase and retrying..."
+            git pull --rebase origin main
+            sleep $((attempt * 2))
+          done
+          echo "Push failed after $max_retries attempts"
+          exit 1