www/yarn-node14: Mark DEPRECATED

- Requires upstream EOL node14
- Set EXPIRATION_DATE to 2023-05-26

Approved by:    portmgr (blanket)

www/yarn-node14/Makefile

+POREREVISION=	1
+
+DEPRECATED=	Requires upstream EOL node14
+EXPIRATION_DATE=	2023-05-26
+
 USES=		nodejs:14,run
 
 MASTERDIR=	${.CURDIR}/../yarn-node18