docs: adds CHANGELOG entry for #55

Updates CHANGELOG.md file with info on fix introduced in #55.

Signed-off-by: Matthew Weier O'Phinney <[email protected]>

Author: weierophinney

CHANGELOG.md

@@ -44,7 +44,7 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#55](https://github.com/laminas/automatic-releases/pull/55) fixes issues with identifying and retrieving `CHANGELOG.md` contents from non-default branches.
 
 ## 1.2.3 - 2020-08-13