Update CHANGELOG.md

Author: pellared

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/golang-templates/seed/compare/v0.21.0...HEAD)
 
+### Added
+
+- Add `run` target which runs `go run`. ([#376](https://github.com/golang-templates/seed/pull/376))
+
 ## [0.21.0](https://github.com/golang-templates/seed/releases/tag/v0.21.0)
 
 ### Added