add reference to the sdk

README.md

@@ -8,7 +8,8 @@ This project contains a source code formatter for the Power Query / M language.
 
 - [powerquery-parser](https://github.com/microsoft/powerquery-parser): A lexer + parser for Power Query. Also contains features such as type validation.
 - [powerquery-language-services](https://github.com/microsoft/powerquery-language-services): A high level library that wraps the parser for external projects, such as the VSCode extension. Includes features such as Intellisense.
-- [vscode-powerquery](https://github.com/microsoft/vscode-powerquery): The VSCode extension for Power Query.
+- [vscode-powerquery](https://github.com/microsoft/vscode-powerquery): The VSCode extension for Power Query language support.
+- [vscode-powerquery-sdk](https://github.com/microsoft/vscode-powerquery-sdk): The VSCode extension for Power Query connector SDK.
 
 ## Build and test