Refine the README tagline by replacing "Master context" with "Select context."

Author: robertpiosik

README.md

@@ -2,7 +2,7 @@
 
 <a href="https://marketplace.visualstudio.com/items?itemName=robertpiosik.gemini-coder" target="_blank"><img src="https://img.shields.io/badge/Install-VS_Code_Marketplace-blue" alt="Get from Visual Studio Code Marketplace" /></a> <a href="https://open-vsx.org/extension/robertpiosik/gemini-coder" target="_blank"><img src="https://img.shields.io/badge/Install-Open_VSX_Registry-a60ee5" alt="Get from Open VSX Registry" /></a> <a href="https://github.com/robertpiosik/CodeWebChat/blob/dev/LICENSE" target="_blank"><img src="https://img.shields.io/badge/License-GPL--3.0-green.svg" alt="GPL-3.0 license" /></a>
 
-Agent-free AI pair programming for production-grade code. Master context to guide the model to the responses you expect.
+Agent-free AI pair programming for production-grade code. Select context to guide the model to the responses you expect.
 
 Works with VS Code, Cursor, Windsurf, and other forks.