build(deps): bump fastify/workflows from 4.1.0 to 4.2.1 (#730)

Bumps [fastify/workflows](https://github.com/fastify/workflows) from 4.1.0 to 4.2.1.
- [Release notes](https://github.com/fastify/workflows/releases)
- [Commits](fastify/workflows@v4.1.0...v4.2.1)

---
updated-dependencies:
- dependency-name: fastify/workflows
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Diff for: .github/workflows/ci.yml

@@ -17,7 +17,7 @@ on:
 
 jobs:
   test:
-    uses: fastify/workflows/.github/workflows/plugins-ci.yml@v4.1.0
+    uses: fastify/workflows/.github/workflows/plugins-ci.yml@v4.2.1
     with:
       license-check: true
       lint: true