Add permissions for auto-close

Bug: none
Change-Id: Ifc4ecab82ff71c7896e6ae1a6e0120cacf98a7f7
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6701569
Commit-Queue: Alex Rudenko <[email protected]>
Commit-Queue: Benedikt Meurer <[email protected]>
Auto-Submit: Alex Rudenko <[email protected]>
Reviewed-by: Benedikt Meurer <[email protected]>

Author: OrKoN

.github/workflows/auto-close-prs.yml

@@ -1,5 +1,9 @@
 name: Auto-close PRs
 
+permissions:
+  pull-requests: write
+  issues: write
+
 on:
   schedule:
     # Run everyday at: https://crontab.guru/#0_6_*_*_*.