huntarr: var_version from 13 to 12

Author: MickLesk

frontend/public/json/huntarr.json

@@ -23,7 +23,7 @@
         "ram": 1024,
         "hdd": 4,
         "os": "debian",
-        "version": "13"
+        "version": "12"
       }
     }
   ],