Update README to include language service updates (#4260)

* Update README.md

* Update README.md

Author: sinemakinci1

README.md

@@ -22,9 +22,7 @@
 **PLEASE**, if you experience any problems, have any questions, or have an idea
 for a new feature, create an issue on [the GitHub page](https://github.com/microsoft/vscode-cmake-tools)!
 
-This extension itself *does not* provide language support for the CMake scripting language.
-For that we bundle [this extension](https://marketplace.visualstudio.com/items?itemName=twxs.cmake) which provides the support.
-A closed-source extension that provides even better support can also be installed: [CMake Language Support](https://marketplace.visualstudio.com/items?itemName=josetr.cmake-language-support-vscode)
+This extension currently provides basic language support for CMake built into the extension. 
 
 ### Microsoft Open Source Code of Conduct