Fix incorrect GitHub Pages URL in readme

Remove .git extension from GitHub Pages URL as it should point to the website, not the repository.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Shahfarzane

readme.md

@@ -30,7 +30,7 @@ If you want to build fonts manually on your own computer:
 * `make test` will run [FontBakery](https://github.com/googlefonts/fontbakery)'s quality assurance tests.
 * `make proof` will generate HTML proof files.
 
-The proof files and QA tests are also available automatically via GitHub Actions - look at https://paper-design.github.io/paper-mono.git.
+The proof files and QA tests are also available automatically via GitHub Actions - look at https://paper-design.github.io/paper-mono.
 
 ## License