[LA-2025] Updating website

[omargohan]

Summary of changes:

• Adding SuSE and FLuidAttacks as gold sponsor
• Removing speaker from website
• Updating speaker's bio and abstract

Tested:

• Locally using hugo

Note to reviewers:

• Please help us to review this PR as it is a little bit urgent to update one of our speakers' info
• Thank you!

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