fix pset swap example

Author: wintercooled

contrib/assets_tutorial/pset_swap_tutorial.py

@@ -210,9 +210,9 @@
         elif out in decoded_c["vout"]:
             blinder_idx = carol_idx
 
-        # The crappy rawtransaction API requires that we reconstruct blinded addresses,
+        # The rawtransaction API requires that we reconstruct blinded addresses,
         # which are split between the "addresses" and "nonce" field
-        address = out["scriptPubKey"]["addresses"][0]
+        address = out["scriptPubKey"]["address"]
         if "commitmentnonce" in out:
             address = alice.createblindedaddress(address, out["commitmentnonce"])