fix: add github token for pr action

Author: Kagashino

.github/workflows/pull-request.yml

@@ -3,6 +3,9 @@ on:
   pull_request:
   workflow_dispatch:
 
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
 jobs:
   worktree_clean_checking:
     name: workspace checking