test: Fix rawtransactions test

Looks like another `assert_raises_jsonrpc` snuck in with bitcoin#11178.
Change it to `assert_raises_rpc_error`.

test/functional/rawtransactions.py

@@ -258,7 +258,7 @@ def run_test(self):
         encrawtx = "010000000001010000000000000072c1a6a246ae63f74f931e8365e15a089c68d61900000000000000000000ffffffff0100e1f50500000000000000000000"
         decrawtx = self.nodes[0].decoderawtransaction(encrawtx, True) # decode as witness transaction
         assert_equal(decrawtx['vout'][0]['value'], Decimal('1.00000000'))
-        assert_raises_jsonrpc(-22, 'TX decode failed', self.nodes[0].decoderawtransaction, encrawtx, False) # force decode as non-witness transaction
+        assert_raises_rpc_error(-22, 'TX decode failed', self.nodes[0].decoderawtransaction, encrawtx, False) # force decode as non-witness transaction
         # non-witness transaction
         encrawtx = "01000000010000000000000072c1a6a246ae63f74f931e8365e15a089c68d61900000000000000000000ffffffff0100e1f505000000000000000000"
         decrawtx = self.nodes[0].decoderawtransaction(encrawtx, False) # decode as non-witness transaction