In general you only have to update files if you have issues. This particular update fixed an issue with tel: links. If you weren't using a tel: link then you wouldn't need do do the update.
The tel: link you have on the page is:
<a href="TEL:07412180432"> </a>
Which means it would be very difficult to click on it, since it is around just a space character. What did you want to click on to initiate a call? It looks like you will have to move your <a> tag around the appropriate element.