Update README to clarify extension name abbreviation in the tagline

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>
 
-Cost-efficient AI coding with first-class support for [prompt caching](https://platform.openai.com/docs/guides/prompt-caching), enabling reduced latency by up to 80% and input token costs by up to 90%.
+CWC is a cost-efficient AI coding extension with first-class support for [prompt caching](https://platform.openai.com/docs/guides/prompt-caching), enabling reduced latency by up to 80% and input token costs by up to 90%.
 
 Works with VS Code family of editors (Cursor, Antigravity, VSCodium, etc.).