[#713] Add changelog entry

Author: bbatsov

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 * [#719](https://github.com/clojure-emacs/cider-nrepl/issues/719): `middleware.test`: gracefully handle exceptions thrown within fixtures.
 * [#722](https://github.com/clojure-emacs/cider-nrepl/issues/722): `middleware.format`: print otherwise non-serializable objects as strings.
+* [#713](https://github.com/clojure-emacs/cider-nrepl/pull/713): Fix a regression in test results formatting.
 
 ## 0.27.2 (2021-10-03)