chore: move CIP 37 to final (#350)

Author: cmwaters

cips/cip-037.md

@@ -4,8 +4,7 @@
 | description | Reduce the validator unbonding period from 21 days to 14 days and 1 hour to improve capital efficiency while maintaining network security |
 | author | Callum (@cmwaters) |
 | discussions-to | <https://forum.celestia.org/t/cip-lower-unbonding-period-to-14-days/2030> |
-| status | Last Call |
-| last-call-deadline | 2025-08-22 |
+| status | Final |
 | type | Standards Track |
 | category | Core |
 | created | 2025-06-16 |