fixup! fix: add client source to api

Author: jmattheis

docs/spec.json

@@ -2394,6 +2394,12 @@
           "type": "string",
           "x-go-name": "Name",
           "example": "My Client"
+        },
+        "source": {
+          "description": "The client source. Default api.",
+          "type": "string",
+          "x-go-name": "Source",
+          "example": "api"
         }
       },
       "x-go-package": "github.com/gotify/server/v2/api"