Update changelog with released v3.10.4 section

CHANGES.rst

@@ -77,7 +77,7 @@ Cubeviz
 
 - Add missing styling to API hints entry for aperture_method in the spectral extraction plugin. [#3231]
 
-- Fixed "spectrum at spaxel" tool so it no longer resets spectral axis zoom. [#3249] 
+- Fixed "spectrum at spaxel" tool so it no longer resets spectral axis zoom. [#3249]
 
 Imviz
 ^^^^^
@@ -259,17 +259,24 @@ Other Changes and Additions
 - Bump required specutils version to 1.16. Moment 0 calculation is now in units
   of flux*dx (rather than flux) [#3184]
 
-3.10.4 (unreleased)
+3.10.4 (2024-10-29)
 ===================
 
 Bug Fixes
 ---------
 
+- Stretch histogram in zoom limits no longer attempts unnecessary updates when zoom limits are changed. [#3151]
+
 Imviz
 ^^^^^
 
 - Remove "From File.." option when running on an external server. [#3239]
 
+Specviz2d
+^^^^^^^^^
+
+- Fix matched mouseover marker for 1d spectrum viewer when mouse is over 2d spectrum viewer. [#3203]
+
 3.10.3 (2024-07-22)
 ===================