fix(deps): update prisma monorepo to v6

Author: renovate[bot]

packages/backend/package.json

@@ -29,12 +29,12 @@
     "@nestjs/graphql": "7.11.0",
     "@nestjs/platform-express": "8.2.4",
     "@nestjs/schematics": "8.0.5",
-    "@prisma/client": "2.30.3",
+    "@prisma/client": "6.13.0",
     "apollo-server-express": "2.25.3",
     "graphql": "15.7.2",
     "graphql-tools": "7.0.5",
     "mysql": "2.18.1",
-    "prisma": "2.30.3",
+    "prisma": "6.13.0",
     "reflect-metadata": "0.1.13",
     "rimraf": "3.0.2",
     "rxjs": "7.4.0"