Add changelog

CHANGELOG.md

@@ -20,6 +20,11 @@ The format is based on [Keep a Changelog].
   default is t) ([#261]).
 
 ### Enhancements
+* With commands `next-history-element` and `previous-history-element`
+  the inserted history element will get selected which helps when the
+  element isn't a member of the candidate set and fixes a problem with
+  file completions when the element is a directory. Before the first
+  file in that directory would be selected ([#341]).
 * Improved exit behaviour of `selectrum-select-current-candidate`. The
   commands gives feedback now when match is required and submission
   not possible. Also it allows submission of the prompt when a match