Bump fastify/github-action-merge-dependabot from 3.5.3 to 3.5.4

Bumps [fastify/github-action-merge-dependabot](https://github.com/fastify/github-action-merge-dependabot) from 3.5.3 to 3.5.4.
- [Release notes](https://github.com/fastify/github-action-merge-dependabot/releases)
- [Commits](fastify/github-action-merge-dependabot@v3.5.3...v3.5.4)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/part_dependabot.yml

@@ -14,7 +14,7 @@ jobs:
       contents: write
 
     steps:
-      - uses: fastify/github-action-merge-dependabot@v3.5.3
+      - uses: fastify/github-action-merge-dependabot@v3.5.4
         with:
           github-token: ${{ github.token }}
           # Major Updates need to be merged manually