Update config_client.json

VLESS-mKCPSeed/config_client.json

@@ -19,7 +19,7 @@
                 "vnext": [
                     {
                         "address": "{{ host }}",
-                        "port": {{ port }},
+                        "port": "{{ port }}",
                         "users": [
                             {
                                 "id": "{{ uuid }}",
@@ -37,4 +37,4 @@
             }
         }
     ]
-}
+}