fix(deps): update prisma monorepo to v6.18.0

Author: renovate[bot]

apps/realworldx-api/package.json

@@ -41,7 +41,7 @@
     "@nestjs/platform-fastify": "^11.1.6",
     "@nestjs/swagger": "^11.1.6",
     "@nestjs/typeorm": "^11.0.0",
-    "@prisma/client": "6.8.1",
+    "@prisma/client": "6.18.0",
     "@repo/api": "workspace:*",
     "@repo/nest-common": "workspace:*",
     "@repo/postgresql-typeorm": "workspace:*",