Add tools api extension sample link (#7722)

Author: roblourens

release-notes/v1_95.md

@@ -431,7 +431,7 @@ We have finalized our [`LanguageModelTool` API](https://code.visualstudio.com/ap
 
 2. The mechanics for language models to support tools, such as extensions passing tools when making a request, language models requesting a tool invocation, and extensions communicating back the result of a tool invocation.
 
-The use of language model tools is complex, and this API does not hide that complexity. If you want to register a tool or make use of tools in your chat participant, we recommend starting with the API docs and the extension sample (TODO links).
+The use of language model tools is complex, and this API does not hide that complexity. If you want to register a tool or make use of tools in your chat participant, we recommend starting with the [extension sample](https://github.com/microsoft/vscode-extension-samples/tree/main/chat-sample).
 
 ### Chat participant detection