message: Fix overflow amount comment
diff: @@ -435,7 +435,7 @@ d2hj739GDLz0b5KuJ2SG6VknMRQM976w/m2qlq0ccVGaaZ2zMIGfpzL3p6adwx/5\
  ";
  //
  -// Payment request with amount overflow (amount is set to 21000001 BTC)
  +// Payment request with amount overflow (amount is set to 107822406.26 QTUM)
  //
  const char* paymentrequest5_cert2_BASE64 =
  "Egt4NTA5K3NoYTI1NhryBArvBDCCAmswggFToAMCAQICAQEwDQYJKoZIhvcNAQELBQAwITEfMB0G\
  