message: fix wrong message showing on merchant payment page
diff: class="payment-request"
  ...attributes
  >
  - <div class="payment-request__explanation">
  - {{#if (and @canDeepLink this.showAsQR)}}
  + <div class="payment-request__explanation" data-test-payment-request-explanation>
  + {{#if (and @canDeepLink (not this.showAsQR))}}
  Please install the Card Wallet app on your mobile phone, then tap on the link below to complete your payment
  {{else}}
  Please install the Card Wallet app on your mobile phone, then scan the QR code below to complete your payment
  