testing/ameba: disable on aarch64. build fails

testing/ameba/APKBUILD

@@ -5,7 +5,7 @@ pkgver=0.5.0
 pkgrel=0
 pkgdesc="A static code analysis tool for Crystal"
 url="https://github.com/veelenga/ameba"
-arch="x86_64 aarch64"  # limited by crystal
+arch="x86_64"  # limited by crystal. build fails on aarch64
 license="MIT"
 makedepends="crystal libxml2-dev shards yaml-dev"
 source="$pkgname-$pkgver.tar.gz::https://github.com/veelenga/$pkgname/archive/v$pkgver.tar.gz