Update README.md

Author: Hakorr

Duck.ai/SearchMessages/README.md

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 # Duck.AI Chat Search 🔎 (DuckDuckGo's AI)
 
-Adds a search bar to search text from your chats!
+Adds a chat search bar to Duck.AI so you can easily search messages in your conversations.
 
 ## Clean UI, won't disturb your regular usage