Add a navigator.canShare check in ShareButton.importable.tsx

Add a defensive check for navigator.canShare as this is not supported by all browsers

Author: arelra

dotcom-rendering/src/components/ShareButton.importable.tsx

@@ -210,6 +210,7 @@ export const ShareButton = ({
 		if (
 			!isLiveBlogBlockDesktop &&
 			'share' in navigator &&
+			'canShare' in navigator &&
 			navigator.canShare(shareData)
 		) {
 			setButtonKind('native');