Update `Chinese (Simplified)` translation

Currently translated at 100.0% (123 of 123 strings)

Translation: Wiki-Bot/Dashboard
Translate-URL: https://translate.wikibot.de/projects/wiki-bot/dashboard/zh-hans/

dashboard/i18n/zh-hans.json

@@ -162,7 +162,7 @@
             "prefix": "前缀：",
             "prefix_space": "以空格结尾的前缀：",
             "role": "最小身份组：",
-            "select_channel": "--选择一个频道--",
+            "select_channel": "-- 选择频道 --",
             "wiki": "默认 wiki：",
             "wiki_check": "检查 wiki"
         },