fixup! meta: merge `output-watcher` and `e2e` workflows (#4886)

.github/workflows/e2e.yml

@@ -153,7 +153,7 @@ jobs:
             ${{ steps.diff.outputs.OUTPUT_DIFF || 'No diff' }}
             ```
 
-            ${{ env.IS_ACCURATE_DIFF != 'true' && format('The following build files have been modified and might affect the actual diff:\n\n```\n{}```', steps.build_chain_changes.outputs.MIGHT_CONTAIN_OTHER_CHANGES) || '' }}
+            ${{ env.IS_ACCURATE_DIFF != 'true' && format('The following build files have been modified and might affect the actual diff:\n\n```\n{0}```', steps.build_chain_changes.outputs.MIGHT_CONTAIN_OTHER_CHANGES) || '' }}
 
             </details>
       - name: Remove 'safe to test' label if cancelled