bookings: shorten Sequoia cabin to Sep 24-26

Host approved the date-change request the same morning with no
cancellation fee. Total drops from US$771.16 to US$542.73; a US$228.43
refund is pending on the card. Update the itinerary, expense ledger and
settlement, mark Sep 26 as checkout day, and save the Booking.com chat
and modification confirmation as sources.

days/2026-09-26.md

@@ -6,7 +6,7 @@
 
 ## Logistics
 
-- Group leaves the Miramonte cabin one day before the booked checkout
+- Checkout day at Miramonte — out by **11:00 AM** (booking shortened to Sep 26 on Sep 16)
 - **8:00 AM PDT** target departure · approximately 4.5–5 hours to Los Angeles before stops and traffic
 - LK is already in Los Angeles; reunion time depends on the group's arrival
 - Avoid another driving excursion after the Miramonte transfer