Update plugins.json

Author: Soulter

plugins.json

@@ -2,7 +2,7 @@
   "astrbot_plugin_grok_filter": {
     "author": "Cheng-MaoMao",
     "repo": "https://github.com/Cheng-MaoMao/astrbot_plugin_grok_filter",
-    "desc" "过滤 grok-3-reasoner 推理模型的思维链内容"
+    "desc": "过滤 grok-3-reasoner 推理模型的思维链内容"
   },
   "FavorSystem": {
     "author": "wuyan1003",