Update WG name references on home page for SDV

Had a recent discussion in which Mike M. pointed out that according the the charter, the name of the WG is "Eclipse Software Defined Vehicle," and that we should not be using a hyphen in the name, as is currently being used on the WG home page

I see five references using "Software-Defined" on the home page:

• Jumbotron headline
• Jumbotron text on the right side under "Interested in..."
• Paragraph in the Jumbotron
• Paragraph in the Sponsors section
• Headline in the About section near the bottom of the page

@sgiacomoni2as @mplagge Any comment?