Add keynote title and abstract (Kimberly K. Arcand) - #2772

Changed pages include:

• 404.html - view
• year/2026/404.html - view
• year/2026/blog/index.html - view
• year/2026/destination/index.html - view
• year/2026/satellites/index.html - view
• year/2026/supporters/index.html - view
• year/2026/welcome/index.html - view
• year/2026/auth/callback/index.html - view
• year/2026/blog/2026-02-03-vis-2026-opc-blog/index.html - view
• year/2026/blog/2026-02-10-vis-2026-opc-blog/index.html - view

There are more changes not included in the list