CHANGELOG.md: added line for #2684

Author: joelanford

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - The flag `--watch-namespace` and `--operator-namespace` was added to `operator-sdk run --local`, `operator-sdk test --local` and `operator-sdk cleanup` commands in order to replace the flag `--namespace` which was  deprecated.([#2617](https://github.com/operator-framework/operator-sdk/pull/2617))
 - The methods `ctx.GetOperatorNamespace()` and `ctx.GetWatchNamespace()` was added `pkg/test` in order to replace `ctx.GetNamespace()` which is  deprecated. ([#2617](https://github.com/operator-framework/operator-sdk/pull/2617))
+- The `--crd-versions` flag was added to the `new`, `add api`, `add crd`, and `generate crds` commands so that users can opt-in to `v1` CRDs. ([#2684](https://github.com/operator-framework/operator-sdk/pull/2684))
 
 ### Changed