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.

itinerary.md

@@ -23,7 +23,7 @@
 |---|---|---|---|
 | [🏠 Airbnb — Daly City](bookings/stays/airbnb-sf-daly-city.md) | Sep 19–22 (3 nights) | $1,049.54 CAD | Auto-pays Sep 7 |
 | [🏕️ Cabin — Yosemite (Wawona)](bookings/stays/cabin-yosemite-wawona.md) | Sep 22–24 (2 nights) | US$933.75 | ✅ Paid |
-| [🌲 Cabin — Sequoia (Miramonte)](bookings/stays/cabin-sequoia-miramonte.md) | Sep 24–27 (3 nights) | US$771.16 | Auto-pays Sep 8 |
+| [🌲 Cabin — Sequoia (Miramonte)](bookings/stays/cabin-sequoia-miramonte.md) | Sep 24–26 (2 nights) | US$542.73 | ✅ Paid Sep 8 · shortened Sep 16 · US$228.43 refund pending |
 | [🏙️ Airbnb — LA (DTLA)](bookings/stays/airbnb-la-dtla.md) | Sep 26–30 (4 nights) | €1,077.00 | ✅ Booked & paid by KT · altered Sep 15 (+1 night, check-in moved to Sep 26) · ⚠️ complete online check-in form |
 | [🎰 Hotel — Las Vegas (Horseshoe)](bookings/stays/hotel-vegas-horseshoe.md) | Sep 30–Oct 3 (3 nights) | US$1,067.70 | ✅ Booked by KT · 2 rooms · pay at property · free cancel until Sep 28 · replaces [Wyndham](bookings/stays/wyndham-desert-rose-las-vegas.md) (cancelled Sep 9) |
 | [🚗 SIXT Car Rental](bookings/transport/car-rental.md) | Sep 20–Oct 5 (15 days booked) | US$897.93 | ✅ Booked (9739014160) · pickup Sep 20, 13:00 PDT · return early Oct 4, 16:30 PDT |