Update subdomains.json

subdomains.json

@@ -33,6 +33,6 @@
   "themoddedchicken": "themoddedchicken.github.io",
   "wassim": "wassimbenzarti.github.io",
   "wiktor": "wiktorwojcik112.github.io",
-  "zh": "zh.github.io"
+  "zh": "zh.github.io",
   "joyghosh": "joyghoshs.github.io"
 }