Add support for k8s 1.31 to ApiServerContainer (#316)

Author: Donnerbart

k8s-versions.json

@@ -131,6 +131,9 @@
       },
       {
         "k8s": "1.30.0"
+      },
+      {
+        "k8s": "1.31.0"
       }
     ]
   }