[docs]: add CHANGELOG.md entry

Signed-off-by: Gerard Vanloo <gerard.vanloo@ibm.com>

Author: Red-GV

CHANGELOG.md

@@ -7,6 +7,10 @@ the release.
 
 ## Unreleased
 
+* [checkout]: change image from alpine to distroless to reduce size
+  ([#2161](https://github.com/open-telemetry/opentelemetry-demo/pull/2161))
+* [product-catalog]: change image from alpine to distroless to reduce size
+  ([#2161](https://github.com/open-telemetry/opentelemetry-demo/pull/2161))
 * [chore] add GOMEMLIMIT to all Go services
   ([#2148](https://github.com/open-telemetry/opentelemetry-demo/pull/2148))
 * [product-catalog] Simplify span event name