Fix the previous fix

I was stupid enough to have a typo in URL (see previous commit).
Signed-off-by: NCleber Rosa <crosa@redhat.com>

setup.py

@@ -23,7 +23,7 @@ setup(name='avocado',
       description='Avocado Test Framework',
       author='Lucas Meneghel Rodrigues',
       author_email='lmr@redhat.com',
-      url='http://github.com/avocadoframework/avocado',
+      url='http://github.com/avocado-framework/avocado',
       packages=['avocado',
                 'avocado.cli',
                 'avocado.core',