Pontoon: Update Guarani (gn) localization of Firefox Accounts

Co-authored-by: Abelardo Ayala Rodríguez <abe_aya@hotmail.com>

locale/gn/auth.ftl

@@ -289,6 +289,15 @@ subscriptionsPaymentProviderCancelled-content-payment = Ikatu nde kuatia’atã
 subscriptionSubsequentInvoice-subject = Jehepyme’ẽ oúva { $productName }-gui
 subscriptionSubsequentInvoice-title = ¡Aguyje ne mboheraguapýre!
 # Variables:
+#  $productName (String) - The name of the subscribed product, e.g. Mozilla VPN
+subscriptionSubsequentInvoice-content-received = Og̃uahẽma ne ñehepyme’ẽ paha { $productName } rupi.
+# Variables:
+#  $invoiceNumber (String) - The invoice number of the subscription invoice, e.g. 8675309
+subscriptionSubsequentInvoice-content-invoice-number = Ñemuhague papapy: <b>{ $invoiceNumber }</b>
+# Variables:
+#  $invoiceNumber (String) - The invoice number of the subscription invoice, e.g. 8675309
+subscriptionSubsequentInvoice-content-invoice-number-plaintext = Ñemuhague papapy: { $invoiceNumber }
+# Variables:
 # $productNameNew (String) - The name of the subscribed product, e.g. Mozilla VPN
 subscriptionUpgrade-subject = Embohekopyahúma { $productNameNew }-pe
 subscriptionUpgrade-title = ¡Aguyje embohekopyahúre!