Updated to have a react node instead of a card title.

Author: dlabaj

packages/react-core/src/components/Card/examples/Card.md

@@ -9,7 +9,6 @@ propComponents:
     'CardHeaderActionsObject',
     'CardHeaderSelectableActionsObject',
     'CardTitle',
-    'CardSubtitle',
     'CardBody',
     'CardFooter',
     'CardExpandableContent'
@@ -27,7 +26,7 @@ import PlusIcon from '@patternfly/react-icons/dist/esm/icons/plus-icon';
 
 ### Basic cards
 
-Basic cards typically have a `<CardTitle>`, `<CardSubtitle>`, `<CardBody>` and `<CardFooter>`. You may omit these components as needed, but it is recommended to at least include a `<CardBody>` to provide details about the card item.
+Basic cards typically have a `<CardTitle>`, `<CardBody>` and `<CardFooter>`. You may omit these components as needed, but it is recommended to at least include a `<CardBody>` to provide details about the card item.
 
 ```ts file='./CardBasic.tsx'