Added Regions insruction to description

Author: bbiggerr

openapi.yaml

@@ -6829,6 +6829,7 @@ paths:
         * **BETA** Using cloud-init with [Metadata](/docs/products/compute/compute-instances/guides/metadata/).
           * Automate system configuration and software installation by providing a base-64 encoded [cloud-config](/docs/products/compute/compute-instances/guides/metadata-cloud-config/) file.
           * Requires a compatible Image. You can determine compatible Images by checking for `cloud-init` under `capabilities` when using Images List ([GET /images](/docs/api/images/#images-list)).
+          * Requires a compatible Region.  You can determine compatible Regions by checking for `Metadata` under `capabilities` when using Regions List ([GET /regions](/docs/api/regions/#regions-list)).
           * This feature is in beta and is currently limited to certain Regions and distributions. Please be aware that this feature may receive breaking updates in the future. This notice will be removed when this feature is out of beta.
 
         **Important**: You must be an unrestricted User in order to add or modify