DOC: Fixed pre-commit error in whatsnew note (pandas-dev#40769)

Author: yeshsurya

doc/source/whatsnew/v1.3.0.rst

@@ -801,7 +801,7 @@ Plotting
 
 - Bug in :func:`scatter_matrix` raising when 2d ``ax`` argument passed (:issue:`16253`)
 - Prevent warnings when matplotlib's ``constrained_layout`` is enabled (:issue:`25261`)
-- Bug in :meth:`BoxPlot._validate_color_args` In box plot when 'dark_background' theme was selected caps or min/max markers for the plot was not visible (:issue:`40769`) 
+- Bug in :meth:`BoxPlot._validate_color_args` In box plot when 'dark_background' theme was selected caps or min/max markers for the plot was not visible (:issue:`40769`)
 - Bug in :func:`DataFrame.plot` was showing the wrong colors in the legend if the function was called repeatedly and some calls used ``yerr`` while others didn't (partial fix of :issue:`39522`)
 - Bug in :func:`DataFrame.plot` was showing the wrong colors in the legend if the function was called repeatedly and some calls used ``secondary_y`` and others use ``legend=False`` (:issue:`40044`)