community/acme-client: Update license

The license changed from ISC to GPL 2.0 only in version 1.3.

community/acme-client/APKBUILD

@@ -2,11 +2,11 @@
 # Maintainer: Jordan Christiansen <xordspar0@gmail.com>
 pkgname=acme-client
 pkgver=1.3.0
-pkgrel=0
+pkgrel=1
 pkgdesc="Client for issuing certificates from ACME-complaint servers"
 url="https://git.sr.ht/~graywolf/acme-client-portable"
 arch="all"
-license="ISC"
+license="GPL-2.0-only"
 makedepends="openssl1.1-compat-dev byacc automake autoconf"
 subpackages="$pkgname-doc"
 source="https://data.wolfsden.cz/sources/acme-client-$pkgver.tar.gz"