update dynamic share button config

Author: nikhilPank

examples/yoti_example_flask/templates/dynamic-share.html

@@ -70,8 +70,12 @@ <h3 class="yoti-sponsor-app-header">The Yoti app is free to download and use:</h
       "clientSdkId": "{{ yoti_client_sdk_id }}",
       "shareUrl": "{{ yoti_share_url }}",
       "button": {
-        "label": "Use Yoti"
-      }
+        "label": "Use Yoti",
+        "align": "center",
+        "width": "auto",
+        "verticalAlign": "top"
+      },
+      "type": "modal"
     }]
   });
   </script>