build(deps-dev): bump fastify-cli from 5.9.0 to 6.0.0

Bumps [fastify-cli](https://github.com/fastify/fastify-cli) from 5.9.0 to 6.0.0.
- [Release notes](https://github.com/fastify/fastify-cli/releases)
- [Commits](fastify/fastify-cli@v5.9.0...v6.0.0)

---
updated-dependencies:
- dependency-name: fastify-cli
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -48,7 +48,7 @@
     "ava": "^5.2.0",
     "c8": "^8.0.1",
     "fastify": "^4.25.1",
-    "fastify-cli": "^5.8.0",
+    "fastify-cli": "^6.0.0",
     "husky": "^8.0.1",
     "lint-staged": "^14.0.1",
     "node-cache": "^5.1.2",