Update EIP-6466: Move to Draft

To unstuck ethereum#8872, have to move this EIP to draft so that parts from
EIP-6493 can be moved to it.

EIPS/eip-6466.md

@@ -4,7 +4,7 @@ title: SSZ Receipts Root
 description: Migration of receipts MPT commitment to SSZ
 author: Etan Kissling (@etan-status), Vitalik Buterin (@vbuterin)
 discussions-to: https://ethereum-magicians.org/t/eip-6466-ssz-receipts-root/12884
-status: Stagnant
+status: Draft
 type: Standards Track
 category: Core
 created: 2023-02-08