Merge pull request #180 from alphagov/add-missing-changelog

Document #176 in changelog

Author: 36degrees

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - [Pull request #179: Use current markup for header and footer](https://github.com/alphagov/tech-docs-gem/pull/179)
 - [Pull request #178: Update dependencies and fix tests](https://github.com/alphagov/tech-docs-gem/pull/178) – includes updating GOV.UK Frontend to v3.6.0.
+- [Pull request #176: Use correct separator for page titles](https://github.com/alphagov/tech-docs-gem/pull/176)
 
 ## 2.0.11