chore: bump fastify-plugin from 5.1.0 to 6.0.0 in the dependencies group (#625)

Bumps the dependencies group with 1 update: [fastify-plugin](https://github.com/fastify/fastify-plugin).


Updates `fastify-plugin` from 5.1.0 to 6.0.0
- [Release notes](https://github.com/fastify/fastify-plugin/releases)
- [Commits](fastify/fastify-plugin@v5.1.0...v6.0.0)

---
updated-dependencies:
- dependency-name: fastify-plugin
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dependencies
...

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Author: dependabot[bot]

package.json

@@ -9,7 +9,7 @@
     "@fastify/busboy": "^3.0.0",
     "@fastify/deepmerge": "^3.0.0",
     "@fastify/error": "^4.0.0",
-    "fastify-plugin": "^5.0.0",
+    "fastify-plugin": "^6.0.0",
     "secure-json-parse": "^4.0.0"
   },
   "devDependencies": {