CHANGELOG.md: add change

Author: estroz

CHANGELOG.md

@@ -7,6 +7,7 @@
 ### Changed
 
 - Replace usage of `github.com/operator-framework/operator-sdk/pkg/restmapper.DynamicRESTMapper` with `sigs.k8s.io/controller-runtime/pkg/client/apiutil.DynamicRESTMapper`. ([#2309](https://github.com/operator-framework/operator-sdk/pull/2309))
+- Fail `operator-sdk olm-catalog gen-csv` if it is not run from a project's root, which the command already assumes is the case. ([#2322](https://github.com/operator-framework/operator-sdk/pull/2322))
 
 ### Deprecated