main/libsrtp: upgrade to 2.6.0

* switch to using GitHub tags instead of archive

main/libsrtp/APKBUILD

 # Contributor: Natanael Copa <ncopa@alpinelinux.org>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=libsrtp
-pkgver=2.5.0
-pkgrel=2
+pkgver=2.6.0
+pkgrel=0
 pkgdesc="implementation of the Secure Real-time Transport Protocol (SRTP)"
 url="https://github.com/cisco/libsrtp"
 arch="all"
 license="BSD-3-Clause"
 makedepends="libpcap-dev meson openssl-dev"
 subpackages="$pkgname-dev"
-source="$pkgname-$pkgver.tar.gz::https://github.com/cisco/libsrtp/archive/v$pkgver.tar.gz"
+source="$pkgname-$pkgver.tar.gz::https://github.com/cisco/libsrtp/archive/refs/tags/v$pkgver.tar.gz"
 
 case "$CARCH" in
 	s390x) options="$options !check" ;;
@@ -33,5 +33,5 @@ package() {
 }
 
 sha512sums="
-bd679ab65ccf22ca30fe867b9649a0b84cfa6fad6e22eb10f081141632f6dd56479a04d525b865f11fd46007303ca211065d9c170e4820d6ea7055403702340a  libsrtp-2.5.0.tar.gz
+96f6e2b7300a416a10e5cc45cf67dadf2f4f81119267689cac4296e2dc6d73398457d1a56b651ab4be6da9e701564d3f256bf6d5f42add5eb2b9b9fe8e438a74  libsrtp-2.6.0.tar.gz
 "