user/mlt: Bump to 6.20.0

user/mlt/APKBUILD

 # Contributor: Carlo Landmeter <clandmeter@gmail.com>
 # Maintainer:
 pkgname=mlt
-pkgver=6.18.0
+pkgver=6.20.0
 pkgrel=0
 pkgdesc="MLT multimedia framework"
 url="https://www.mltframework.org/"
@@ -45,5 +45,5 @@ package() {
 	make DESTDIR="$pkgdir" install
 }
 
-sha512sums="af6042fa554a7bf87060aaab401c51111fd03a1e50037024662fe727a2281c218f62db07f2c44db62d46f2b9ff67d4599f7aaccc2b337e20394383a24e3c5953  mlt-6.18.0.tar.gz
+sha512sums="939e837fb07ff0eace308987d83913e979f82c6eb156b40fde784f3f2b031b5f6896ac96dcde1627925cbb6fc76725f3fc4e5b2d0616fae11263648bcdbe82e3  mlt-6.20.0.tar.gz
 d00f01d50d5c78b1da5b43dc2b0bbfc49d5e383b602169ae9554734d29f6d43b9da8f97546141933c06ff0367bb4c9f0d2161bbcb6f016265bb0aa1dcbfcb3b1  mlt-6.14.0-locale-header.patch"