www/mod_http2: Update to 2.0.21

www/mod_http2/Makefile

 PORTNAME=	mod_http2
-DISTVERSION=	2.0.20
+DISTVERSION=	2.0.21
 CATEGORIES=	www
 MASTER_SITES=	https://github.com/icing/mod_h2/releases/download/v${DISTVERSION}/
 PKGNAMEPREFIX=	${APACHE_PKGNAMEPREFIX}

www/mod_http2/distinfo

-TIMESTAMP = 1687083929
-SHA256 (mod_http2-2.0.20.tar.gz) = 6f5430f6f16eb5ac888657cb3e9862a50ab6063cee4c00faeda00cd9eb9814a7
-SIZE (mod_http2-2.0.20.tar.gz) = 1026566
+TIMESTAMP = 1690797498
+SHA256 (mod_http2-2.0.21.tar.gz) = 406925f510c047030a9d9edaf9fb31f9b159b195771f8759945a74151f80aa31
+SIZE (mod_http2-2.0.21.tar.gz) = 998860