changelog: cut [email protected] (#244)

Author: coury-clark

charts/sourcegraph/CHANGELOG.md

@@ -8,6 +8,11 @@ Use `**BREAKING**:` to denote a breaking change
 
 ## Unreleased
 
+
+## 4.5.0
+
+- Sourcegraph 4.5.0 is now available
+
 - Deploy Sourcegraph Executors now deployable via helm [#236](https://github.com/sourcegraph/deploy-sourcegraph-helm/pull/236).
 
 ## 4.4.2