chore(deps)(deps-dev): bump @nestjs/testing in /rag-api

Bumps [@nestjs/testing](https://github.com/nestjs/nest/tree/HEAD/packages/testing) from 10.4.22 to 11.1.19.
- [Release notes](https://github.com/nestjs/nest/releases)
- [Commits](https://github.com/nestjs/nest/commits/v11.1.19/packages/testing)

---
updated-dependencies:
- dependency-name: "@nestjs/testing"
  dependency-version: 11.1.19
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

rag-api/package.json

@@ -44,7 +44,7 @@
   "devDependencies": {
     "@nestjs/cli": "^10.3.0",
     "@nestjs/schematics": "^10.1.0",
-    "@nestjs/testing": "^10.3.0",
+    "@nestjs/testing": "^11.1.19",
     "@types/express": "^4.17.21",
     "@types/jest": "^29.5.11",
     "@types/multer": "^1.4.11",