Update README for ExternalLink for accuracy

This README has been updated since this PR was first worked on (in #41681). As such, this commit brings in the latest updates for accuracy.

packages/components/src/external-link/README.md

@@ -1,6 +1,6 @@
 # ExternalLink
 
-Renders a hyperlink that, when tapped or clicked, opens in a new window.
+Link to an external resource.
 
 ## Usage
 
@@ -14,27 +14,16 @@ const MyExternalLink = () => (
 
 ## Props
 
-The text that's displayed within the component's tags will be "clickable" and link to any URL provided via the `href` prop. As outlined below, the `href` prop is the only required prop.
+The component accepts the following props. Any other props will be passed through to the `a`.
 
-There are two other optional props that are web only. That is, they're not available for use with the React Native implementation of the editor.
+### `children`: `ReactNode`
 
-### `href`
+The content to be displayed within the link.
 
-The URL that is being linked to and will open in a new window when tapped or clicked.
-
--   Type: `String`
 -   Required: Yes
 
-### `className` (web only)
-
-An optional CSS class that's added to the hyperlink's HTML.
-
--   Type: `String`
--   Required: No
+### `href`: `string`
 
-### `rel` (web only)
+The URL of the external resource.
 
-A <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/rel">rel attribute</>.
-
--   Type: `String`
--   Required: No
+-   Required: Yes