Update util.jl

Author: DilumAluthge

test/util.jl

@@ -15,7 +15,7 @@ end
 function test_task_failed_exception(test_result::Test.Pass, cfg::ConfigForTestingTaskFailedException)
   observed_outer_ex = extract_test_result_value(test_result)
   @test observed_outer_ex isa expected_outer_ex_T
-  observed_inner_ex = recursively_unwrap_task_failed_ex(observed_outer_ex)
+  observed_inner_ex = recursively_unwrap_ex(observed_outer_ex)
   @test observed_inner_ex isa typeof(expected_inner_ex_INSTANCE)
   @test observed_inner_ex == expected_inner_ex_INSTANCE
   return nothing