build(deps): bump fastify/github-action-merge-dependabot (#324)

Bumps [fastify/github-action-merge-dependabot](https://github.com/fastify/github-action-merge-dependabot) from 3.1.5 to 3.1.6.
- [Release notes](https://github.com/fastify/github-action-merge-dependabot/releases)
- [Commits](fastify/github-action-merge-dependabot@v3.1.5...v3.1.6)

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

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

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -123,6 +123,6 @@ jobs:
       pull-requests: write
       contents: write
     steps:
-      - uses: fastify/[email protected].5
+      - uses: fastify/[email protected].6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}