(bot 1272989785) moving EIPS/eip-3220.md to stagnant (#4297)

PR 4297 with changes to EIPS/eip-3220.md was created on 
	(2021-Sep-26th@10.55.23)
which is before the cutoff date of 
	(2021-Oct-3rd@01.5.45)
i.e. 2 weeks ago

EIPS/eip-3220.md

@@ -3,7 +3,7 @@ eip: 3220
 title: Crosschain Identifier Specification
 author: Weijia Zhang (@weijia31415), Peter Robinson (@drinkcoffee)
 discussions-to: https://ethereum-magicians.org/t/eip-3220-crosschain-id-specification/5446
-status: Draft
+status: Stagnant
 type: Standards Track
 category: Core
 created: 2020-10-21