CHANGELOG.md: mention test explorer on Windows is a work-in-progress

Change-Id: Ife724dbaade5c6ad4ca115d06f03ac416d9e49ca
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/350749
Trust: Hyang-Ah Hana Kim <[email protected]>
Run-TryBot: Hyang-Ah Hana Kim <[email protected]>
Reviewed-by: Suzy Mueller <[email protected]>

Author: hyangah

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 This version requires VS Code 1.59 or newer.
 
-🎉🧪 The extension implements [the Testing API of VS Code](https://code.visualstudio.com/api/extension-guides/testing). You can navigate and run/profile tests using the test explorer UI! Further work for better profiling and debugging support through the test explorer is underway. Please give it a try and provide feedback.
+🎉🧪 The extension implements [the Testing API of VS Code](https://code.visualstudio.com/api/extension-guides/testing). You can navigate and run/profile tests using the test explorer UI! Windows support and further work for better profiling and debugging support through the test explorer is underway. Please give it a try and provide feedback.
 
 A list of all issues and changes can be found in the [v0.28.0 milestone](https://github.com/golang/vscode-go/milestone/34) and [commit history](https://github.com/golang/vscode-go/compare/v0.27.2...v0.28.0).