Upper case .git repo

Author: cirosantilli

Diff for: README.md

@@ -23,6 +23,7 @@ There are also some tests that could not be included here conveniently:
 - <https://github.com/cirosantilli/test-control-chars>
 - <https://github.com/cirosantilli/test-empty-commit>
 - <https://github.com/cirosantilli/test-empty-subdir>
+- <https://gitlab.com/cirosantilli/test-GIT/tree/master> (fails on GitHub)
 - <https://github.com/cirosantilli/test-large-file>
 - <https://github.com/cirosantilli/test-long-filename-1024>
 - <https://github.com/cirosantilli/test-long-filename-256>