Fix acceptance tests to use new syntax.

examples/acceptance_tests/script_context/validators/deploy.ak

@@ -40,7 +40,7 @@ fn assert_outputs(outputs) {
   when outputs is {
     [output_1, output_2, ..] ->
       assert_first_output(output_1) && assert_second_output(output_2)
-    _ -> error "expected transaction to have (at least) 2 outputs"
+    _ -> error @"expected transaction to have (at least) 2 outputs"
   }
 }
 
@@ -67,7 +67,7 @@ fn assert_second_output(output) {
     ),
     when output.datum is {
       InlineDatum(_) -> True
-      _ -> error "expected inline datum"
+      _ -> error @"expected inline datum"
     },
   ]
   |> list.and