Update 'reason for payment' warning instructions

core/src/main/resources/i18n/displayStrings.properties

@@ -757,6 +757,7 @@ portfolio.pending.step2.confReached=Your trade has reached at least one blockcha
 
 portfolio.pending.step2_buyer.refTextWarn=Important: when making the payment, leave the \"reason for payment\" field \
   empty. DO NOT put the trade ID or any other text like 'bitcoin', 'BTC', or 'Bisq'. \
+  If you are required to fill in a reason, use your account name eg "Joe Bloggs", alternatively enter something non-descriptive like a dash (-). \
   You are free to discuss via trader chat if an alternate \"reason for payment\" would be suitable to you both.
 # suppress inspection "TrailingSpacesInProperty"
 portfolio.pending.step2_buyer.fees=If your bank charges you any fees to make the transfer, you are responsible for paying those fees.