security/py-service_identity: Mark DEPRECATED and set EXPIRATION_DATE to 2024-01-31

- While I'm here, fix path (devel/ -> security/)

PR:		275167
Reported by:	John Hein <jcfyecrayz@liamekaens.com>
Approved by:	Axel Rau <axel.rau@chaos1.de> (maintainer)

security/py-service_identity/Makefile

@@ -11,6 +11,10 @@ WWW=		https://github.com/pyca/service_identity
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+# See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275167
+DEPRECATED=	Use security/py-service-identity
+EXPIRATION_DATE=2024-01-31
+
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}attrs>=16.0.0:devel/py-attrs@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyasn1-modules>=0:devel/py-pyasn1-modules@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyasn1>=0:devel/py-pyasn1@${PY_FLAVOR}