chore(backend): bump @fastify/rate-limit in /services/backend

Bumps [@fastify/rate-limit](https://github.com/fastify/fastify-rate-limit) from 10.3.0 to 11.1.0.
- [Release notes](https://github.com/fastify/fastify-rate-limit/releases)
- [Commits](fastify/fastify-rate-limit@v10.3.0...v11.1.0)

---
updated-dependencies:
- dependency-name: "@fastify/rate-limit"
  dependency-version: 11.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

services/backend/package.json

@@ -23,7 +23,7 @@
     "@fastify/cookie": "^11.0.2",
     "@fastify/cors": "^11.2.0",
     "@fastify/formbody": "^8.0.2",
-    "@fastify/rate-limit": "^10.3.0",
+    "@fastify/rate-limit": "^11.1.0",
     "@fastify/sse": "^0.4.0",
     "@fastify/swagger": "^9.7.0",
     "@fastify/swagger-ui": "^5.2.5",