Add details about Tooltip status

Author: connor-baer

packages/circuit-ui/components/Tooltip/Tooltip.mdx

@@ -5,7 +5,9 @@ import * as Stories from './Tooltip.stories';
 
 # Tooltip
 
-<Status variant="legacy" />
+<Status variant="legacy">
+  Does not meet [accessibility requirements](https://inclusive-components.design/tooltips-toggletips/).
+</Status>
 
 Tooltips display additional information on floating labels.
 They can be activated when users hover, focus, tap, or click.