Update CHANGELOG.md for 0.27.1 release (#6350)

CHANGELOG.md

@@ -14,8 +14,23 @@ Certbot adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
+*
+
+## 0.27.1 - 2018-09-06
+
+### Fixed
+
 * Fixed parameter name in OpenSUSE overrides for default parameters in the
   Apache plugin. Certbot on OpenSUSE works again.
+
+Despite us having broken lockstep, we are continuing to release new versions of
+all Certbot components during releases for the time being, however, the only
+package with changes other than its version number was:
+
+* certbot-apache
+
+More details about these changes can be found on our GitHub repo:
+https://github.com/certbot/certbot/milestone/60?closed=1
 
 ## 0.27.0 - 2018-09-05