Update doc/api/next_api_changes/deprecations/29358-TH.rst

Co-authored-by: Elliott Sales de Andrade <[email protected]>

Author: timhoffm

doc/api/next_api_changes/deprecations/29358-TH.rst

@@ -3,7 +3,7 @@
 
 Since matplotlib 3.1 `PR 12831 <https://github.com/matplotlib/matplotlib/pull/12831>`_
 scale objects should be reusable and therefore independent of any particular Axis.
-Therefore, the use of of the *axis* parameter in the ``__init__`` had been discouraged.
+Therefore, the use of the *axis* parameter in the ``__init__`` had been discouraged.
 However, having that parameter in the signature was still necessary for API
 backwards-compatibility. This is no longer the case.