chore: bump harmony chart version

[gabor-boros]

This PR bumps the harmony chart version to indicate that the chart supports Tutor 17.x (v17.0.4).

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[openedx-webhooks]

Thanks for the pull request, @gabor-boros! Please note that it may take us up to several weeks or months to complete a review and merge your PR.

Feel free to add as much of the following information to the ticket as you can:

• supporting documentation
• Open edX discussion forum threads
• timeline information ("this must be merged by XX date", and why that is)
• partner information ("this is a course on edx.org")
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All technical communication about the code itself will be done via the GitHub pull request interface. As a reminder, our process documentation is here.

Please let us know once your PR is ready for our review and all tests are green.

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