build(deps-dev): bump @nestjs/testing from 9.3.12 to 9.4.0

Bumps [@nestjs/testing](https://github.com/nestjs/nest) from 9.3.12 to 9.4.0.
- [Release notes](https://github.com/nestjs/nest/releases)
- [Commits](nestjs/nest@v9.3.12...v9.4.0)

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

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

package.json

@@ -83,7 +83,7 @@
     "@nestjs/core": "9.3.12",
     "@nestjs/platform-express": "9.3.12",
     "@nestjs/swagger": "6.3.0",
-    "@nestjs/testing": "9.3.12",
+    "@nestjs/testing": "9.4.0",
     "@types/express": "4.17.17",
     "@types/node": "18.15.11",
     "@types/supertest": "2.0.12",