tests: change description for payer_note case

Author: Nazarevsky

tests/test_xpay.py

@@ -175,7 +175,7 @@ def test_xpay_simple(node_factory):
     # BOLT 12 (with payer_note specified).
     offer = l3.rpc.offer('any')['bolt12']
     b12 = l1.rpc.fetchinvoice(offer, '100000msat')['invoice']
-    l1.rpc.xpay(invstring=b12, payer_note="Payment for a cup of cheap coffee")
+    l1.rpc.xpay(invstring=b12, payer_note="Payment for a cup of coffee")
 
     # Failure from l4.
     b11 = l4.rpc.invoice('10000msat', 'test_xpay_simple2', 'test_xpay_simple2 bolt11')['bolt11']