Correct incorrect username for martindurant

Author: pbranson

docs/index.rst

@@ -97,7 +97,7 @@ documentation, code reviews, comments and/or ideas:
 * :user:`Trevor Manz <manzt>`
 * :user:`Grzegorz Bokota <Czaki>`
 * :user:`Josh Moore <joshmoore>`
-* :user:`Martin Durant <mdurant>`
+* :user:`Martin Durant <martindurant>`
 * :user:`Paul Branson <pbranson>`
 
 Numcodecs bundles the `c-blosc <https://github.com/Blosc/c-blosc>`_ library.

docs/release.rst

@@ -9,7 +9,7 @@ Unreleased
 * Add support for Python 3.9 and Update GitHub Actions.
 
 * Add support for byte Shuffle filter
-  By :user:`Paul Branson <pbranson>` and :user:`Martin Durant <mdurant>` :issue:`273`.
+  By :user:`Paul Branson <pbranson>` and :user:`Martin Durant <martindurant>` :issue:`273`.
 
 * Update Windows + Mac CI to run all tests.
   By :user:`Jackson Maxfield Brown <JacksonMaxfield>`, :issue:`276`.