fix(workflow): use pull_request_target for discord reminder workflow (#459)

* fix: Fixed linting issues

* fix(workflow): switch discord reminder to pull_request_target for comment permissions

Author: Harxhit

.github/workflows/gssoc-discord-pin-reminder.yml

@@ -1,7 +1,7 @@
 name: GSSoC Discord Pin Reminder
 
 on:
-  pull_request:
+  pull_request_target:
     types: [closed]
   workflow_dispatch: