Merge pull request matplotlib#22187 from dpoznik/fix-axhline-typo

Fix typo in `axhline` docstring

Author: QuLogic

lib/matplotlib/axes/_axes.py

@@ -675,7 +675,7 @@ def annotate(self, text, xy, *args, **kwargs):
     @docstring.dedent_interpd
     def axhline(self, y=0, xmin=0, xmax=1, **kwargs):
         """
-        Add a horizontal line across the axis.
+        Add a horizontal line across the Axes.
 
         Parameters
         ----------