GitHub icon now links to docs repo

Author: jsiegle

source/conf.py

@@ -193,7 +193,7 @@
     "footer_start": ["copyright"],
     'icon_links': [
         dict(name='GitHub',
-             url='https://github.com/open-ephys/plugin-GUI',
+             url='https://github.com/open-ephys/gui-docs',
              icon='fab fa-github'),
         dict(name='Twitter',
              url='https://twitter.com/openephys',