docs: updated changelog

FossilOrigin-Name: 4a1c1cecf88c4f23ad5e482e305bf0b4120539b2cb6e3a6d4ead1a7bf5b72dac

Author: thindil

CHANGELOG.md

@@ -9,6 +9,7 @@ of the program.
 ### Changed
 - Better looking information about the program's error in the `ifStatements`
   rule.
+- Better looking information about too long routines in the `hasDoc`.
 
 ### Fixed
 - Crash when checking very long routines for parameters with `params` rule.