chore(deps): update peerdependency @prisma/client to v6

Author: renovate[bot]

.stacks/core/database/package.json

@@ -48,7 +48,7 @@
     "typecheck": "tsc --noEmit"
   },
   "peerDependencies": {
-    "@prisma/client": "^4.7.1",
+    "@prisma/client": "^6.4.1",
     "@stacksjs/utils": "workspace:*",
     "vitest": "^0.25.6"
   },