trans: add missing comma in zhtw (#254)

translations/zhtw-zhtw.all.json

@@ -324,7 +324,7 @@
     "translation": "你們的網站設計爛死了 / 我找到 bug 啦啦啦啦"
   },
   {
-    "id": "why_written_in_go"
+    "id": "why_written_in_go",
     "translation": "爲啥要用 GO 寫啊？沒其他更好的程式語言？"
   },
   {