Create article for new features in ARIA version 1.3

[MewenLeHo]

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[MewenLeHo]

To do list:

• [ ] Add a warning saying that ARIA v1.3 is still a draft version
• [ ] Add explanation about the difference between aria-description and aria-describedby (see https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Reference/Attributes/aria-description)
• [ ] Add text saying that aria-braillelabel should not be used without aria-label and aria-brailleroledescription should not be used without aria-description
• [ ] Add support informations?
• [ ] Ask a braille user what makes a good aria-braillelabel and a good aria-brailleroledescription? I have the feeling that it could be a good subject for another article, like 'How to write good accessible names for braille users?' or 'What are the differences between a good aria-label and a good aria-braillelabel?'
• [x] Find another example for comment role

[MewenLeHo]

~~Release scheduled for June 20.~~ Or later... Maybe... :(

[MewenLeHo]

Release scheduled for August 1st.