[VPOS QR] Allow web share for iframe

Author: JuliCarracedo

vpos/checkout/javascript/src/bancard-checkout.js

@@ -140,6 +140,7 @@ const internalMethods = {
     iframe.src = newIframeUrl;
     iframe.style.width = '100%';
     iframe.style.borderWidth = '0px';
+    iframe.setAttribute('allow', 'web-share');
 
     iframeContainer.innerHTML = '';
     iframeContainer.appendChild(iframe);