add WSL alpine entry

remote-release-notes/v1_38.md

@@ -8,4 +8,8 @@ You can now install an extension from VSIX that is located in the remote machine
 
 ## WSL
 
+### Alpine WSL
+
+Alpine WSL is now also enabled with VS Code stable builds. It is still in preview mode as extensions installed in Alpine Linux may not work due to glibc dependencies in native code inside the extension.
+
 ## SSH