Fix column heading

docs/2.0. Usage.md

@@ -14,7 +14,7 @@ Once all of the field have been completed, press 'Run'. The result of the tests
 
 The result of each test case will be one of the following:
 
-| Pass | Reason |
+| Test Result | Reason |
 | - | - |
 | ![Pass](https://place-hold.it/128x32/28a745.png?text=Pass&fontsize=12&bold) | Successful test case. |
 | ![Fail](https://place-hold.it/128x32/dc3545.png?text=Fail&fontsize=12&bold) | Required feature of the specification has been found to be implemented incorrectly. |