Update changelog

Author: p-j-smith

docs/changelog.rst

@@ -20,6 +20,7 @@ Other changes
 - The ``HistogramWidget`` now has two vertical lines showing the contrast limits used
   to render the selected layer in the main napari window.
 - Added an example gallery for the ``FeaturesHistogramWidget``.
+- Add widgets for setting bin parameters for ``HistogramWidget``.
 
 1.2.0
 -----
@@ -28,7 +29,6 @@ Changes
 - Dropped support for Python 3.8, and added support for Python 3.11.
 - Histogram plots of points and vector layers are now coloured with their napari colourmap.
 - Added support for Matplotlib 3.8
-- Add widgets for setting histogram bin parameters
 
 1.1.0
 -----