chore: auto approve dependabot pr (#4720)

Author: sweatybridge

.github/workflows/automerge.yml

@@ -22,12 +22,20 @@ jobs:
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
 
+      - name: Generate token
+        id: app-token
+        if: ${{ steps.meta.outputs.update-type == null || steps.meta.outputs.update-type == 'version-update:semver-patch' || (!startsWith(steps.meta.outputs.previous-version, '0.') && steps.meta.outputs.update-type == 'version-update:semver-minor') }}
+        uses: actions/create-github-app-token@v2
+        with:
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
+
       # Here the PR gets approved.
       - name: Approve a PR
         if: ${{ steps.meta.outputs.update-type == null || steps.meta.outputs.update-type == 'version-update:semver-patch' || (!startsWith(steps.meta.outputs.previous-version, '0.') && steps.meta.outputs.update-type == 'version-update:semver-minor') }}
         run: gh pr review --approve "${{ github.event.pull_request.html_url }}"
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
 
       # Finally, this sets the PR to allow auto-merging for patch and minor
       # updates if all checks pass