add dev true to the PHP 8.5

Author: thecaliskan

extension-matrix/config/vs.json

@@ -49,9 +49,10 @@
     "os": "windows-2022",
     "type": "github-hosted"
   },
-  "dev": {
+  "8.5": {
     "vs": "2022",
     "os": "windows-2022",
+    "dev": true,
     "type": "github-hosted"
   },
   "master": {