The file README.md from the extension is used by the Marketplace website. If you use [foo] followed by (bar) inside literal text, single and triple back tick, it is recognized as a Markdown link.
This construct happens easily in regular expressions.
The .* is expanded to the full directory of the README.md file.
The Markdown syntax highlighting in VSC has a similar problem, it marks the text between () as a clickable link.
The Markdown Preview shows the literal text correct.