Add changelog

CHANGELOG.md

@@ -54,6 +54,11 @@ The format is based on [Keep a Changelog].
   default is t) ([#261]).
 
 ### Enhancements
+* The variables `selectrum-should-sort-p` has been marked deprecated.
+  You should use the new `selectrum-should-sort` which is also exposed
+  as a user option now ([#441]).
+* The variable `selectrum-move-default-candidate` can be used to
+  configure how the UI handles the default value ([#441]).
 * The command `selectrum-repeat` can also repeat the last recursive
   session now ([#322], [#440]).
 * The default value of `selectrum-extend-current-candidate-highlight`