Fix README badges

Author: dolfinus

README.rst

@@ -18,7 +18,7 @@ setuptools-git-versioning
     :target: https://setuptools-git-versioning.readthedocs.io
 .. |Build| image:: https://github.com/dolfinus/setuptools-git-versioning/workflows/Tests/badge.svg
     :target: https://github.com/dolfinus/setuptools-git-versioning/actions
-.. |Test Coverage| image:: https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/
+.. |Coverage| image:: https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/
     dolfinus/38b81533c2b8c389db378e3bae7df034/raw/setuptools_git_versioning_badge.json
     :target: https://github.com/dolfinus/setuptools-git-versioning/actions
 .. |pre-commit.ci| image:: https://results.pre-commit.ci/badge/github/dolfinus/setuptools-git-versioning/master.svg