build(deps): bump the npm_and_yarn group across 1 directory with 2 updates

Bumps the npm_and_yarn group with 2 updates in the /services/user-service directory: [fastify](https://github.com/fastify/fastify) and [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser).


Updates `fastify` from 5.7.4 to 5.8.1
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](https://github.com/fastify/fastify/compare/v5.7.4...v5.8.1)

Updates `fast-xml-parser` from 5.3.6 to 5.4.1
- [Release notes](https://github.com/NaturalIntelligence/fast-xml-parser/releases)
- [Changelog](https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/NaturalIntelligence/fast-xml-parser/compare/v5.3.6...v5.4.1)

---
updated-dependencies:
- dependency-name: fastify
  dependency-version: 5.8.1
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: fast-xml-parser
  dependency-version: 5.4.1
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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

services/user-service/package.json

@@ -20,7 +20,7 @@
     "@connectrpc/connect-fastify": "^2.1.1",
     "@connectrpc/protoc-gen-connect-es": "^0.13.2",
     "@types/mongoose-unique-validator": "^1.0.7",
-    "fastify": "^5.7.4",
+    "fastify": "^5.8.1",
     "kafkajs": "^2.2.4",
     "mongoose": "^7.8.6",
     "mongoose-unique-validator": "^4.0.0",