Fix failing test.

Author: eiriktsarpalis

src/libraries/System.Text.Json/tests/System.Text.Json.SourceGeneration.Unit.Tests/JsonSourceGeneratorDiagnosticsTests.cs

@@ -344,8 +344,8 @@ public void JsonStringEnumConverterWarns()
 
             var expectedDiagnostics = new DiagnosticData[]
             {
-                new(DiagnosticSeverity.Warning, enum1TypeLocation, "The member 'HelloWorld.Enum1' has been annotated with 'JsonStringEnumConverter' which is not supported in Native AOT. Consider using the generic 'JsonStringEnumConverter<TEnum>' instead."),
-                new(DiagnosticSeverity.Warning, enum2PropLocation, "The member 'HelloWorld.MyClass.Enum2Prop' has been annotated with 'JsonStringEnumConverter' which is not supported in Native AOT. Consider using the generic 'JsonStringEnumConverter<TEnum>' instead."),
+                new(DiagnosticSeverity.Warning, enum1TypeLocation, "The member 'HelloWorld.Enum1' has been annotated with 'JsonStringEnumConverter' which is not supported in native AOT. Consider using the generic 'JsonStringEnumConverter<TEnum>' instead."),
+                new(DiagnosticSeverity.Warning, enum2PropLocation, "The member 'HelloWorld.MyClass.Enum2Prop' has been annotated with 'JsonStringEnumConverter' which is not supported in native AOT. Consider using the generic 'JsonStringEnumConverter<TEnum>' instead."),
             };
 
             CompilationHelper.AssertEqualDiagnosticMessages(expectedDiagnostics, result.Diagnostics);