Update doc link again

Author: dstansby

setup.cfg

@@ -20,7 +20,7 @@ classifiers =
     Topic :: Software Development :: Testing
 project_urls =
     Bug Tracker = https://github.com/matplotlib/napari-matplotlib/issues
-    Documentation = http://www.davidstansby.com/napari-matplotlib-docs/
+    Documentation = https://napari-matplotlib.github.io
     Source Code = https://github.com/matplotlib/napari-matplotlib
     User Support = https://github.com/matplotlib/napari-matplotlib/issues