Fixup huytbt/h50 (#18841)

keyboards/huytbt/h50/info.json

@@ -1,4 +1,5 @@
 {
+  "manufacturer": "huytbt",
   "keyboard_name": "H50",
   "url": "https://github.com/huytbt/h50-keyboard",
   "maintainer": "huytbt",