release: update the version in about.sourcegraph.com GetStarted

Created by: aileenrose

This new file in the website repo needs to be updated with the version number for any new releases:

https://github.com/sourcegraph/about/blob/main/website/src/components/GetStarted.tsx

note from @slimsag

We will need to add an equivalent edit command here that automates updating that line as part of the release: https://sourcegraph.com/github.com/sourcegraph/sourcegraph/-/blob/dev/release/src/release.ts#L319-327