deps: bump fastify from 5.6.1 to 5.6.2 (#276)

Bumps [fastify](https://github.com/fastify/fastify) from 5.6.1 to 5.6.2.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](fastify/fastify@v5.6.1...v5.6.2)

---
updated-dependencies:
- dependency-name: fastify
  dependency-version: 5.6.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

api/package.json

@@ -15,7 +15,7 @@
     "@fastify/postgres": "^6.0.2",
     "@filecoin-station/deal-observer-db": "^1.0.0",
     "debug": "^4.4.3",
-    "fastify": "^5.6.1",
+    "fastify": "^5.6.2",
     "http-assert": "^1.5.0",
     "pg": "^8.16.3"
   }