libsForQt5.mlt: 6.10.0 -> 6.12.0

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/mlt/versions

pkgs/development/libraries/mlt/qt-5.nix

···
 
 stdenv.mkDerivation rec {
   name = "mlt-${version}";
-  version = "6.10.0";
+  version = "6.12.0";
 
   src = fetchFromGitHub {
     owner = "mltframework";
     repo = "mlt";
     rev = "v${version}";
-    sha256 = "0ki86yslr5ywa6sz8pjrgd9a4rn2rr4mss2zkmqi7pq8prgsm1fr";
+    sha256 = "0pzm3mjbbdl2rkbswgyfkx552xlxh2qrwzsi2a4dicfr92rfgq6w";
   };
 
   buildInputs = [