docs: update doc

Refs: CDS-216

src/components/feedback/banner/Banner.mdx

@@ -10,7 +10,7 @@ import * as BannerStories from './Banner.stories';
 The Banner is the component that informs the user about status of a process.
 It remains visible until the user does something for resolving the status, or clicks on “Close” button.
 
-There are four available statuses of this component:
+There are four available severities of this component:
 
 - **Success**: it gives the user positive feedback about the completion of a process.
 - **Error**: it gives the user negative feedback about an action that has not been completed or that an error has occurred.