Update changelog

CHANGELOG.md

@@ -7,12 +7,15 @@
   useful summary for people upgrading their application, not a replication
   of the commit log.
 
+## Unreleased
+* Remove the brand colour for Department for Energy Security and Net Zero ([PR #3255](https://github.com/alphagov/govuk_publishing_components/pull/3255))
+
 ## 34.10.0
 
 * Add GA4 auto tracker ([PR #3240](https://github.com/alphagov/govuk_publishing_components/pull/3240))
 * Add GA4 tracking to contextual sidebar Ukraine CTA ([PR #3236](https://github.com/alphagov/govuk_publishing_components/pull/3236))
 * Use string splitter on taxonomyAll and taxonomyAllIds pageview values ([PR #3249](https://github.com/alphagov/govuk_publishing_components/pull/3249))
-* Add a new brand colour for Department for Science, Innovation and Technology ([PR #3252](https://github.com/alphagov/govuk_publishing_components/pull/3252))
+* Add a new brand colour for Department for Energy Security and Net Zero ([PR #3252](https://github.com/alphagov/govuk_publishing_components/pull/3252))
 
 ## 34.9.1