Add vscode release cadence (#218)

Author: audgirka

docs/guides/vscode/release.md

@@ -1,9 +1,15 @@
-These steps are currently manual but we should consider automating, at least some of them in the future.
+## Release cadence
 
-Assuming that the next version is `0.8.1`:
+A pre-release will be done every time we do a stable release.
+This will ensure VSCode extension `auto-update` functionality doesn't break.
+Refer vscode [docs](https://code.visualstudio.com/api/working-with-extensions/publishing-extension#prerelease-extensions) for pre-release and release versions.
 
 ## Release steps
 
+These steps are currently manual but we should consider automating, at least some of them in the future.
+
+Assuming that the next version is `0.8.1`:
+
 1. `git checkout -b release/0.8.1`
 1. Copy draft release notes from github
 1. Edit `CHANGELOG.md` and insert copied text