main/asciidoctor: upgrade to 2.0.15

main/asciidoctor/APKBUILD

 # Contributor: Seung Soo Mun <hamletmun@gmail.com>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=asciidoctor
-pkgver=2.0.14
+pkgver=2.0.15
 pkgrel=0
 pkgdesc="Converter for AsciiDoc to HTML5, DocBook 5 (or 4.5) and other formats"
 url="https://rubygems.org/gems/$pkgname"
@@ -33,4 +33,6 @@ package() {
 	done
 }
 
-sha512sums="8aaa70998f6ae415f54425689c624c4c6c41285dbc0e98880179f281649c6490c4d55cf114d794dd9ceec569222b933fce840d0d7b9406207bb2316c74706ecd  asciidoctor-2.0.14.gem"
+sha512sums="
+55ab7ceb85e219a36fdcb21d5620199e1d46281742cf52ce5892f36ee5db1119b535f488fae57aa360cbaee762f903d6bd957e3a65781eacd810b41eafcaa8f1  asciidoctor-2.0.15.gem
+"