Fix whitespace

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

Author: hugovk

CHANGELOG.rst

@@ -6,7 +6,7 @@ Changelog
 ----------------------------------------------------------------------------
 
 - Add Python 3.12 and 3.13 classifiers (#147)
-    Contributed by Hugo van Kemenade
+   Contributed by Hugo van Kemenade
 - Dark mode: Also give aside.topic a dark background (#150)
    Contributed by Hugo van Kemenade
 - Revert "Enable the slash keypress to focus the search field (#141)" (#146)