community/xbindkeys: silence linter issues

 * use SPDX identifier for license
 * remove $pkgname from source url

community/xbindkeys/APKBUILD

@@ -7,11 +7,11 @@ pkgrel=3
 pkgdesc="Program for launching shell commands via keyboard shortcuts in X"
 url="https://nongnu.org/xbindkeys/"
 arch="all"
-license="GPL-2.0"
+license="GPL-2.0-or-later"
 depends="guile"
 makedepends="guile-dev libx11-dev"
 subpackages="$pkgname-doc"
-source="https://nongnu.org/$pkgname/$pkgname-$pkgver.tar.gz
+source="https://nongnu.org/xbindkeys/xbindkeys-$pkgver.tar.gz
 	10-guile3_0.patch"
 
 prepare() {