Fix incorrect negative in use-memo intro (#8027)

Author: karlhorky

src/content/reference/eslint-plugin-react-hooks/lints/use-memo.md

@@ -5,7 +5,7 @@ version: rc
 
 <Intro>
 
-Validates usage of the `useMemo` hook without a return value. See [`useMemo` docs](/reference/react/useMemo) for more information.
+Validates that the `useMemo` hook is used with a return value. See [`useMemo` docs](/reference/react/useMemo) for more information.
 
 </Intro>