Invalid theme format in command summary

[yiwern5]

The format should be theme THEME_NAME instead:

[nus-se-script]

Team's Response

We accept the bug, however we downgraded the severity to "Low", with the following reasons:

• We have already listed the command in another section of the user guide with the correct format. Hence this issue is just a matter of inconsistency.

  Items for the Tester to Verify

  :question: Issue severity

Team chose [severity.Low] Originally [severity.Medium]

• [ ] I disagree

Reason for disagreement: [replace this with your explanation]

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