Minor corrections to new period finding demo

[mariaschuld]

Fixes some minor issues raised by readers.

[github-actions]

👋 Hey, looks like you've updated some demos!

🐘 Don't forget to update the dateOfLastModification in the associated metadata files so your changes are reflected in Glass Onion (search and recommendations).

Please hide this comment once the field(s) are updated. Thanks!

[mariaschuld]

@alvaro-at-xanadu do we update the modification date if it's just a few typos?

[github-actions]

Thank you for opening this pull request.

You can find the built site at this link.

Deployment Info:

• Pull Request ID: 1357
• Deployment SHA: 1952a89b378a2a6b624ab04c0b3ea72742e38e20
  (The Deployment SHA refers to the latest commit hash the docs were built from)

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[dwierichs]

Nice, thanks @mariaschuld 🙏 💯
Now I actually understood why there are seven qubits, I got it wrong before!
Up to the question about modification date, it looks good to me 👍

[alvaro-at-xanadu]

@alvaro-at-xanadu do we update the modification date if it's just a few typos?

Hi @mariaschuld Yes, this is the best practice even if corrections are minor