chore: Update pr-title.yml (#54)

## Motivation

Subscribe to synchronize events in order to alleviate pr-title workflow
problems (it won't trigger sometimes).

Author: nieomylnieja

.github/workflows/pr-title.yml

@@ -1,6 +1,6 @@
 on:
   pull_request:
-    types: [opened, reopened, edited]
+    types: [opened, reopened, edited, synchronize]
   merge_group:
 name: pr-title
 jobs: