🔍 fix: Serper link typo in Docs (#410)

* (minor) add {convo} to titleprompt example

* 🔍 fix: Serper link typo in Docs

Current link was a 404

Author: illgitthat

pages/docs/configuration/librechat_yaml/object_structure/web_search.mdx

@@ -55,7 +55,7 @@ webSearch:
   ]}
 />
 
-**Note:** Get your API key from [Serper.dev](https://serper.dev/api-key)
+**Note:** Get your API key from [Serper.dev](https://serper.dev/api-keys)
 
 
 ### searxngInstanceUrl