test: bump patch version of fixture locked to a minor

Author: pieh

tests/fixtures/middleware-subrequest-vuln/package.json

@@ -8,13 +8,13 @@
     "build": "next build"
   },
   "dependencies": {
-    "next": "15.1.9",
+    "next": "15.1.11",
     "react": "18.2.0",
     "react-dom": "18.2.0"
   },
   "test": {
     "dependencies": {
-      "next": "15.1.9"
+      "next": "15.1.11"
     }
   }
 }