chore: move CIP-35 Header Pruning for Light Nodes to Final (#344)

Author: jcstein

cips/cip-035.md

@@ -4,8 +4,7 @@
 | description | Mechanism to retain a fixed range of headers instead of whole history |
 | author | Hlib Kanunnikov ([@Wondertan](https://github.com/Wondertan)) |
 | discussions-to | <https://forum.celestia.org/t/cip-header-pruning-for-lns/1958> |
-| status | Last Call |
-| last-call-deadline | 2025-08-05 |
+| status | Final |
 | type | Standards Track |
 | category | Data Availability |
 | created | 2025-03-21 |