Modified the change log to mention 'specreduce.utils.align_2d_spectrum_along_trace'.

Author: hpparvi

Diff for: CHANGES.rst

@@ -16,6 +16,13 @@ Other changes
 1.4.2
 ------
 
+New Features
+^^^^^^^^^^^^
+- Added a ``specreduce.utils.align_2d_spectrum_along_trace`` utility function that aligns a
+  rectilinear 2D spectrum image along a spectrum trace. The rectification can be done using
+  either linear interpolation, giving a sub-pixel shift resolution, or using integer shifts.
+  The function also updates the image mask and propagates the uncertainties.
+
 Bug Fixes
 ^^^^^^^^^
 - Fixed Astropy v7.0 incompatibility bug [#229] in ``tracing.FitTrace``: changed to use