MAINT: adding workaround for astropy type hints so sphinx doesn't choke on them here

Author: bsipocz

docs/conf.py

@@ -197,7 +197,9 @@ def __getattr__(cls, name):
     edit_on_github_doc_root = "docs"
 
 nitpicky = True
-nitpick_ignore = [('py:class', 'astroquery.mast.core.MastQueryWithLogin')]
+nitpick_ignore = [('py:class', 'astroquery.mast.core.MastQueryWithLogin'),
+                  # astropy interited type annotations
+                  ('py:class', 'ConfigItem')]
 
 
 # -- Linkcheck builder options ----------------------------------------------