Update improve-docs.yml

Author: 4ian

.github/workflows/improve-docs.yml

@@ -17,6 +17,7 @@ on:
   schedule:
     - cron: "0 10 * * *" # Every day at 10:00 UTC (offset from the other workflow)
   workflow_dispatch: # Manual trigger
+  pull_request: # Testing
 
 permissions:
   contents: write