Update CHANGELOG.md

Author: jcs090218

CHANGELOG.md

@@ -11,7 +11,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 * Extract triggeration's major modes to each languages.
 * Fix support for multiline document string in Python.
 * Fix bleeding edge cases for `docstr-key` support.
-* Drop Emacs version 26.x and lower (79a2c87190a8a2c1e78b41529d9da0fd4fc2bfe1)
+* Drop Emacs version 26.x and lower ([`79a2c87`](../../commit/79a2c87190a8a2c1e78b41529d9da0fd4fc2bfe1))
 
 ## 5.7.0
 > Released Feb 22, 2021