Typo in README.md for storage-resize-images extension

[al-the-x]

There's a typo in the README.md for the storage-resize-images:

extensions/storage-resize-images/README.md

Lines 27 to 39 in 79ae81b

	### Example Event Handler for Successful Resize Operation
	```typescript
	import * as functions from 'firebase-functions';
	import { onCustomEventPublished } from 'firebase-functions/v2/eventarc';
	export const onImageResized = onCustomEventPublished(
	"firebase.extensions.storage-resize-images.v1.onSuccess",
	(event) => {
	functions.logger.info("Resize Image is successful", event);
	// Additional operations based on the event data can be performed here
	return Promise.resolve();
	}
	);

The code block is missing a closing code-fence, so the rest of the document is rendered as code instead of as Markdown HTML.