remote release notes: add wsl version number

remote-release-notes/v1_63.md

@@ -82,7 +82,7 @@ In the `settings.json`:
 }
 ```
 
-## WSL
+## WSL (version 0.63.x)
 
 The WSL - Remote extension now uses a new connection method for WSL 2 that tackles reconnection issues that can occur after hibernate and when working on machines with flaky internet connections. It should also help when working behind a proxy.