Fixing filename error in setup.py

I slightly borked a merge conflict a moment ago.

setup.py

@@ -17,7 +17,7 @@ setup(name='cheat',
       package_data={'cheatsheets': [f for f in os.listdir('cheatsheets')
                                     if '.' not in f]},
       scripts=['cheat'],
-      data_files=[('/usr/share/zsh/site-functions', ['autocompletion/cheat.zsh']),
+      data_files=[('/usr/share/zsh/site-functions', ['autocompletion/_cheat.zsh']),
                   ('/etc/bash_completion.d'       , ['autocompletion/cheat.bash']),
                   ('/usr/share/fish/completions'  , ['autocompletion/cheat.fish'])
               ]