Add condition for not being on trunk when pushing in format CI (#1466)

Don't push unless we aren't on trunk.

.github/workflows/format-check.yml

@@ -37,7 +37,7 @@ jobs:
       id: commit
 
     - name: Push changes
-      if: steps.commit.outcome == 'success'
+      if: github.ref != 'refs/heads/trunk' 
       run: |
         git push origin HEAD:${GITHUB_HEAD_REF}