testing/melange: upgrade to 0.20.1

https://github.com/chainguard-dev/melange/releases/tag/v0.20.1

testing/melange/APKBUILD

 maintainer="fossdd <fossdd@pwned.life>"
 pkgname=melange
-pkgver=0.21.2
+pkgver=0.22.0
 pkgrel=0
 pkgdesc="Build apk packages using declarative pipelines"
 url="https://github.com/chainguard-dev/melange"
@@ -36,5 +36,5 @@ package() {
 }
 
 sha512sums="
-56e6f70269dbaae507350b3b834a48af4d76a0b927b4b91e1717a205c89bfaebb45edf90936afac0172413e3354246a4316a63ab1658b5aae4b45bb63e9d5d87  melange-0.21.2.tar.gz
+85ed8fef2cd3b7e3e8a4d0039e2ecaff5a537a212678387a6d8b803e90d44c38085631ecbeb3a429d0885c396653c9b022887ca34d47c140bece3f8b36492634  melange-0.22.0.tar.gz
 "