ci: revert to try to get failure

- changing back to pull_request because now the workflow is not even being
	triggered?

Signed-off-by: Aiden Woodruff <[email protected]>

Author: bobpaw

.github/workflows/cleanup-caches.yml

@@ -1,7 +1,7 @@
 name: Cleanup caches on closed PRs
 # From https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/caching-dependencies-to-speed-up-workflows#matching-a-cache-key
 on:
-  pull_request_target:
+  pull_request:
     types: [ closed ]
 jobs:
   cleanup: