Add alias snippet from #19 to description

[ottworks]

No description provided.

[ottworks]

Wasn't sure which tags were allowed in the XML, so there's no special formatting for the snippet.

[flathubbot]

Started test build 82898

[flathubbot]

Build 82898 successful
To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/80779/com.visualstudio.code.flatpakref

[nedrichards]

This isn't a great location for this information as it's not really immediately actionable for a user. Would be a good patch to add to https://github.com/flathub/com.visualstudio.code/blob/master/flatpak-warning.txt though.

[nikodunk]

Or maybe to the brand-new readme, which is the same as the flatpak-warning but visible beyond first-dismiss? It's also linked directly from the description already.