Fix unit test.

framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/ExceptionHandling/ExceptionTestController_Tests.cs

@@ -108,7 +108,7 @@ public class ExceptionTestController_Tests : AspNetCoreMvcTestBase
 
         var result = await GetResponseAsObjectAsync<RemoteServiceErrorResponse>("/api/exception-test/ExceptionOnUowSaveChange", HttpStatusCode.Conflict);
         result.Error.ShouldNotBeNull();
-        result.Error.Message.ShouldBe("The data you have submitted has already changed by another user/client. Please discard the changes you've done and try from the beginning.");
+        result.Error.Message.ShouldBe("The data you have submitted has already been changed by another user. Discard your changes and try again.");
 
      #pragma warning disable 4014
                  _fakeExceptionSubscriber