Bump fastify from 4.7.0 to 4.8.1 in /api

Bumps [fastify](https://github.com/fastify/fastify) from 4.7.0 to 4.8.1.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](fastify/fastify@v4.7.0...v4.8.1)

---
updated-dependencies:
- dependency-name: fastify
  dependency-type: direct:production
...

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

Author: dependabot[bot]

api/package-lock.json

@@ -24,7 +24,7 @@
     "dayjs": "^1.11.4",
     "dompurify": "^2.4.0",
     "express-mongo-sanitize": "^2.2.0",
-    "fastify": "^4.7.0",
+    "fastify": "^4.8.1",
     "fastify-file-upload": "^4.0.0",
     "mongodb": "^4.10.0",
     "node-cache": "^5.1.2",