Update remote release notes

remote-release-notes/images/1_39/wsl-remote-explorer.png

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+version https://git-lfs.github.com/spec/v1
+oid sha256:94479cb431dd55a95b1c68fb85ff309689d4287977a03979685672cefb8c1f64
+size 25285

remote-release-notes/v1_39.md

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 ## VS Code Remote Core
 
+### Opening a local file
+
+The default behavior when opening a local file while in a remote window is now to open that file in the same window. To return to the previous behavior where opening a local file would open a new window you can set `"window.openFilesInNewWindow": "on"`.
+
 ## WSL
 
+### Remote Explorer
+
+WSL has joined Containers and SSH in the Remote Explorer. You can see your installed distros, connect to a distro, set your default distro, and see the folders you've opened on a distro in the Remote Explorer.
+
+![WSL Remote Explorer](images/1_39/wsl-remote-explorer.png)
+
 ## Containers
 
 ### Save configuration for images when attaching to a container