You'll notice
Adding a marketplace from a GitHub git URL now normalizes it to GitHub shorthand form
What
When adding a plugin marketplace, a new helper now normalizes the source entry: if the source type is github, it normalizes the repository string; if the source type is git and the URL actually points to a GitHub repository, it rewrites the entry to use source: "github" with the shorthand repo name instead of keeping it as a raw git URL.
Why
This means marketplaces added by pasting a plain GitHub git URL get stored in the same normalized shorthand form as ones added directly as GitHub sources, keeping marketplace entries consistent regardless of how they were added.