ci: bump peter-evans/enable-pull-request-automerge from 2 to 3 (#5067)

Bumps [peter-evans/enable-pull-request-automerge](https://github.com/peter-evans/enable-pull-request-automerge) from 2 to 3.
- [Release notes](https://github.com/peter-evans/enable-pull-request-automerge/releases)
- [Commits](https://github.com/peter-evans/enable-pull-request-automerge/compare/v2...v3)

---
updated-dependencies:
- dependency-name: peter-evans/enable-pull-request-automerge
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/web-api-publish.yml

@@ -42,7 +42,7 @@ jobs:
           signoff: true
           team-reviewers: "@goauthentik/core"
           author: authentik bot <github-bot@goauthentik.io>
-      - uses: peter-evans/enable-pull-request-automerge@v2
+      - uses: peter-evans/enable-pull-request-automerge@v3
         with:
           token: ${{ secrets.BOT_GITHUB_TOKEN }}
           pull-request-number: ${{ steps.cpr.outputs.pull-request-number }}