Update auto-merge workflow

Author: ffried

.github/workflows/enable-auto-merge.yml

@@ -1,16 +1,14 @@
 name: Auto-merge for Dependabot PRs
 
-on: pull_request_target
+on: pull_request
 
 permissions:
-  pull-requests: write
   contents: write
 
 jobs:
   enable-auto-merge:
-    if: ${{ github.actor == 'dependabot[bot]' }}
-    name: Enable auto-merge for Dependabot PRs
     runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
     steps:
       - name: Enable auto-merge
         run: gh pr merge --auto --rebase "$PR_URL"