CHANGELOG.md in govuk_navigation_helpers-5.0.0 vs CHANGELOG.md in govuk_navigation_helpers-5.1.0

@@ -1,4 +1,9 @@
+## 5.1.0
+
+* Display Elsewhere in GOV.UK and Elsewhere on the web related links on new
+  taxonomy sidebar.
+
 ## 5.0.0
 
 * **BREAKING CHANGE**: Update the gds-api-adapters gem. This includes a change
   which replaces the `GOVUK-Fact-Check-Id` header with the
   `GOVUK-Auth-Bypass-Id` header when passing on requests from the client to