changes made to spelling of questionaire in the doc by removing duplicate n.

[Haarika701]

changes made to the spelling of the questionnaire in the doc by removing duplicate n.

Checklist:

• I have read freeCodeCamp's contribution guidelines.
• My pull request has a descriptive title (not a vague title like Update index.md)

Closes freeCodeCamp/freeCodeCamp#44731

[gikf]

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[moT01]

Thanks for the PR @Haarika701 - it was fixed with another one so I am going to close this. Happy coding 🎉