ci(pr-checks.yml): update automerge job for use with rulesets

.github/workflows/pr-checks.yml

@@ -88,19 +88,13 @@ jobs:
       buildOnly: ${{ github.event.pull_request.head.repo.owner.login != 'Lundalogik' || github.actor == 'dependabot[bot]' || github.event_name == 'merge_group' }}
     secrets: inherit
 
-  autoapprove:
+  automerge:
     needs: [lint, build, test, autosquash, docs]
-    # Only run job if the PR comes from a repo owned by Lime and the PR was
-    # created by Dependabot.
+    permissions:
+      contents: write
+      pull-requests: write
     if: github.event.pull_request.head.repo.owner.login == 'Lundalogik' && github.actor == 'dependabot[bot]' && github.event_name != 'merge_group'
     runs-on: ubuntu-latest
     steps:
-      - name: Enable Automerge
-        run: gh pr merge --auto --rebase "$PR_URL"
-        env:
-          PR_URL: ${{ github.event.pull_request.html_url }}
-          GITHUB_TOKEN: ${{ secrets.ENABLE_AUTOMERGE }}
-      - name: Autoapprove
-        uses: hmarr/auto-approve-action@f0939ea97e9205ef24d872e76833fa908a770363 # v4.0.0
-        with:
-          github-token: ${{ secrets.APPROVE_AUTOMATIC_PRS }}
+      - name: Automerge
+        run: "curl -L -X PUT -H \"Accept: application/vnd.github+json\" -H \"Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}\" -H \"X-GitHub-Api-Version: 2022-11-28\" https://api.github.com/repos/Lundalogik/lime-elements/pulls/${{ github.event.pull_request.number }}/merge -d '{\"merge_method\":\"rebase\"}'"