fix github project name

Author: vuillaut

setup.cfg

@@ -5,7 +5,7 @@ author = Thomas Vuillaume, Mikael Jacquemont
 author_email = thomas.vuillaume@lapp.in2p3.fr
 url = https://github.com/cta-observatory/ctaplot
 long_description = file: README.rst
-github_project = cta-observatory/cta-plot
+github_project = cta-observatory/ctaplot
 license = MIT
 
 [options]