Add Sammy Gill's attendance details (w3c#11)

Author: sammygill

planning/redmond-2026/index.md

@@ -78,6 +78,7 @@ Agenda planning TBD. Flag issues with Agenda+ F2F or note them here.
 | Lea Verou | ? | ? | ? | none | ? |
 | Oriol Brufau | 2026-03-29 | 2026-04-03 | Airbnb? | Strong dislike of cheese and shellfish | Flying to/from SEA |
 | Sam Davis Omekara Jr. | n/a | n/a | n/a | shellfish | Local |
+| Sammy Gill | 03/30 | 04/03 | ? | None | |
 | Tab Atkins-Bittner | ? | ? | ? | none | ? |
 | Yanling Wang | n/a | n/a | n/a | None | Local, partial attendance |
 | Zoe Lilley-Verou | ? | ? | ? | none | observer |