CI: do not attempt to open a PR when docs update is done in a PR

Author: fedorov

.github/workflows/update-indices-docs.yml

@@ -51,14 +51,29 @@ jobs:
         run: |
           git diff --exit-code docs/indices_reference.md || echo "changed=true" >> $GITHUB_OUTPUT
 
+      - name: Commit changes to PR
+        if:
+          steps.git-check.outputs.changed == 'true' && github.event_name ==
+          'pull_request'
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+          git add docs/indices_reference.md
+          git commit -m "docs: update indices_reference.md with latest schemas"
+          git push
+
       - name: Configure git
-        if: steps.git-check.outputs.changed == 'true'
+        if:
+          steps.git-check.outputs.changed == 'true' && github.event_name !=
+          'pull_request'
         run: |
           git config --global user.name "github-actions[bot]"
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
 
       - name: Create Pull Request
-        if: steps.git-check.outputs.changed == 'true'
+        if:
+          steps.git-check.outputs.changed == 'true' && github.event_name !=
+          'pull_request'
         uses: peter-evans/create-pull-request@v6
         with:
           commit-message: