[cypress] Update Menu.cy.js

[brianteeman]

Corrects a copy paste error in the description of the test

code review

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

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[heelc29]

I have tested this item ✅ successfully on d11ad6b

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[laoneo]

I have tested this item ✅ successfully on d11ad6b

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[alikon]

RTC

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[brianteeman]

Thanks