opt: update config.example.json

Kingtous · Kingtous · commit 198f70d52469 · 2025-03-13T09:11:20.000+08:00
diff --git a/config/config.example.toml b/config/config.example.toml
@@ -45,5 +45,5 @@ api_key = "sk-..."
 
 # Optional configuration, Search settings.
 # [search]
-# Search engine for agent to use. Default is "Google", can be set to "Baidu".
+# Search engine for agent to use. Default is "Google", can be set to "Baidu" or "DuckDuckGo".
 #engine = "Google"
