Update SDV Contribution Day website -- add Speakers

add the following speakers info:

• Stephen Walli, Microsoft - picture from last time - https://sdv.eclipse.org/sdv-contribution-day-june-2022/
• Tom Fleischmann, CARIAD SE - picture from last time - https://sdv.eclipse.org/sdv-contribution-day-june-2022/
• Filipe Prezado, Microsoft - picture from last time - https://sdv.eclipse.org/sdv-contribution-day-june-2022/
• Michael Plagge, Eclipse Foundation - picture from the photo shooting: https://www.eclipse.org/org/foundation/staff.php
• Ansgar Lindwedel, Robert Bosch GmbH - picture from last time - https://sdv.eclipse.org/sdv-contribution-day-june-2022/
• Edgar Hindemith, T-Systems - see comment below
• Stefan Schumacher, T-Systems - see comment below
• Dr. Christian Hort, T-Systems - see comment below
• Mike Haller, Bosch -- see comment below
• Sven Erik Jeroschewski, Bosch, -- tba