fix(deps): update dependency @mikro-orm/nestjs to v7

Author: renovate[bot]

apps/backend/package.json

@@ -33,7 +33,7 @@
     "@mikro-orm/cli": "^6.6.7",
     "@mikro-orm/core": "^6.6.7",
     "@mikro-orm/migrations": "^6.6.7",
-    "@mikro-orm/nestjs": "^6.1.1",
+    "@mikro-orm/nestjs": "^7.0.0",
     "@mikro-orm/postgresql": "^6.6.7",
     "@mikro-orm/reflection": "^6.6.7",
     "@mikro-orm/seeder": "^6.6.7",