devel/py-awscrt: Update to 0.21.5

Changes:	https://github.com/awslabs/aws-crt-python/releases

devel/py-awscrt/Makefile

 PORTNAME=	awscrt
-PORTVERSION=	0.21.2
+PORTVERSION=	0.21.5
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

devel/py-awscrt/distinfo

-TIMESTAMP = 1721148490
-SHA256 (awscrt-0.21.2.tar.gz) = 37ace28d0d7a91f90862dd2994872a15962b7b4f1376e0b7b01a821954611507
-SIZE (awscrt-0.21.2.tar.gz) = 33579734
+TIMESTAMP = 1726080985
+SHA256 (awscrt-0.21.5.tar.gz) = 7ec2a67af30fbf386494df00bbdf996f7024000df6b01ab160014afef2b91005
+SIZE (awscrt-0.21.5.tar.gz) = 35794789