Update doc/devel/api_changes.rst

Co-authored-by: hannah <[email protected]>

Author: timhoffm

doc/devel/api_changes.rst

@@ -258,6 +258,6 @@ You find several examples for good descriptions if you search the codebase for
 ``.. admonition:: Discouraged``.
 
 Additionally, if a whole function is discouraged, prefix the summary line with
-``[*Discouraged*]`` so that it renders in API overview like this
+``[*Discouraged*]`` so that it renders in the API overview like this
 
     [*Discouraged*] Return the XAxis instance.