Add changelaog entry

Author: yuhan0

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 * Allow additional directories, beyond the default `clj[sc]`, to be correctly formulated by `clojure-expected-ns` via new `defcustom` entitled `clojure-directory-prefixes`
 * Recognize babashka projects (identified by the presence of `bb.edn`).
+* [#601](https://github.com/clojure-emacs/clojure-mode/pull/601): Add new command `clojure-promote-fn-literal` for converting #() function literals to `fn` form 
 
 ### Changes