chore(deps-dev): bump @nestjs/testing from 10.4.1 to 10.4.15

Bumps [@nestjs/testing](https://github.com/nestjs/nest/tree/HEAD/packages/testing) from 10.4.1 to 10.4.15.
- [Release notes](https://github.com/nestjs/nest/releases)
- [Commits](https://github.com/nestjs/nest/commits/v10.4.15/packages/testing)

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

Signed-off-by: dependabot[bot] <[email protected]>

packages/coordinator/package.json

@@ -71,7 +71,7 @@
   "devDependencies": {
     "@nestjs/cli": "^10.4.2",
     "@nestjs/schematics": "^10.1.2",
-    "@nestjs/testing": "^10.4.1",
+    "@nestjs/testing": "^10.4.15",
     "@types/express": "^4.17.17",
     "@types/jest": "^29.5.2",
     "@types/lowdb": "^1.0.15",