Update hover state for the menu component to make it more readable for Universal Design

[lucasveil]

As follow up to this slack discussion it appears that the hover state of the menu component is not seen on a low contrast screen. For a better readability suggested action are:

• change the weight of the text
• update the navigation token

[lucasveil]

Material Design, Carbon and Altassian uses the same pattern for menus.
And here is the WCAG documentation

[BirteThornquist]

Ready for review @lucasveil. I added a new text style for Navigation/Menu Title hover in the design tokens here And used this new text style for the hover state of the Menu Item here

[lucasveil]

Nice work. Approved for me @BirteThornquist