Auto-approve fix for BOT_PAT (#176)

Author: ssbarnea

.github/workflows/ack.yml

@@ -75,15 +75,15 @@ jobs:
 
       # https://docs.github.com/en/code-security/dependabot/working-with-dependabot/automating-dependabot-with-github-actions#approve-a-pull-request
       - name: Enable auto-merge for safe bots PRs
-        if: contains(fromJson('["dependabot[bot]", "pre-commit-ci[bot]"]'), github.actor)
+        if: env.BOT_PAT != null && contains(fromJson('["dependabot[bot]", "pre-commit-ci[bot]"]'), github.actor)
         run: gh pr merge --auto --squash "$PR_URL"
         env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GH_TOKEN: ${{ secrets.BOT_PAT || secrets.GITHUB_TOKEN }}
 
       - name: Approve a PR
-        if: contains(fromJson('["dependabot[bot]", "pre-commit-ci[bot]"]'), github.actor)
+        if: env.BOT_PAT != null && contains(fromJson('["dependabot[bot]", "pre-commit-ci[bot]"]'), github.actor)
         run: gh pr review --approve "$PR_URL"
         env:
           PR_URL: ${{github.event.pull_request.html_url}}
-          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
+          GH_TOKEN: ${{ secrets.BOT_PAT || secrets.GITHUB_TOKEN }}