Docs: fix required status of onSelectUrl prop of MediaReplaceFlow component

[fabiankaegy]

What?

Fix documaentation of the MediaReplaceFlow component to indicate that the onSelectUrl prop is not actually required.

Looking at the sourcecode the code checks for the presence of the prop and only renders the media url field if the callback function was provided.

gutenberg/packages/block-editor/src/components/media-replace-flow/index.js

Lines 207 to 228 in 6465552

	{ onSelectURL && (
	// eslint-disable-next-line jsx-a11y/no-noninteractive-element-interactions
	<form className="block-editor-media-flow__url-input">
	<span className="block-editor-media-replace-flow__image-url-label">
	{ __( 'Current media URL:' ) }
	</span>
	<Tooltip text={ mediaURL } position="bottom">
	<div>
	<LinkControl
	value={ { url: mediaURL } }
	settings={ [] }
	showSuggestions={ false }
	onChange={ ( { url } ) => {
	onSelectURL( url );
	editMediaButtonRef.current.focus();
	} }
	/>
	</div>
	</Tooltip>
	</form>
	) }

Why?

Because the current documentation is misleading

[Mamaduka]

Makes sense 👍