Fix check_error_codes CI job

The diff command was missing a --quiet argument, causing the job not to
fail when unminified messages were found.

This commit will cause CI to fail because there's an unminified error
in main. The unminified error will be fixed by #24688.

.circleci/config.yml

@@ -329,7 +329,7 @@ jobs:
           name: Search build artifacts for unminified errors
           command: |
             yarn extract-errors
-            git diff || (echo "Found unminified errors. Either update the error codes map or disable error minification for the affected build, if appropriate." && false)
+            git diff --quiet || (echo "Found unminified errors. Either update the error codes map or disable error minification for the affected build, if appropriate." && false)
 
   yarn_test:
     docker: *docker