fix(H016): Allow attributes on <title>

[francoisfreitag]

From https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title:

This element only includes the global attributes.

I picked those that seemed reasonable from https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes#list_of_global_attributes

Pull Request Check List

• [x] Added tests for changed code.
• [x] Updated documentation for changed code.

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[monosans]

Thank you!