fix: Fix auto-assignment workflow.

Author: BenHenning

.github/workflows/assign_reviewers.yml

@@ -15,9 +15,11 @@ on:
 jobs:
   requested-reviewer:
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
     steps:
       - name: Assign requested reviewer
-        uses: actions/github-script@v5
+        uses: actions/github-script@v7
         with:
           script: |
             try {