Bump fastify/github-action-merge-dependabot from 2.4.0 to 2.6.0

Bumps [fastify/github-action-merge-dependabot](https://github.com/fastify/github-action-merge-dependabot) from 2.4.0 to 2.6.0.
- [Release notes](https://github.com/fastify/github-action-merge-dependabot/releases)
- [Commits](fastify/github-action-merge-dependabot@v2.4.0...v2.6.0)

---
updated-dependencies:
- dependency-name: fastify/github-action-merge-dependabot
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -55,6 +55,6 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     steps:
-      - uses: fastify/github-action-merge-dependabot@v2.4.0
+      - uses: fastify/github-action-merge-dependabot@v2.6.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}