forgot parentheses in function name

Author: evelez7

clang-tools-extra/test/clang-doc/conversion_function.cpp

@@ -14,4 +14,4 @@ struct MyStruct {
 // CHECK-YAML:     Name:            'operator T'
 
 // CHECK-HTML: <h3 id='{{[0-9A-F]*}}'>operator T</h3>
-// CHECK-HTML: <p>public T operator T</p>
+// CHECK-HTML: <p>public T operator T()</p>