csound: 6.11.0 -> 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/csound/versions

pkgs/applications/audio/csound/default.nix

@@ -14,7 +14,7 @@
 
 stdenv.mkDerivation rec {
   name = "csound-${version}";
-  version = "6.11.0";
+  version = "6.12.0";
 
   enableParallelBuilding = true;
 
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
     owner = "csound";
     repo = "csound";
     rev = version;
-    sha256 = "1nnfl8dqvc5b3f94zbvdg6bxr2wlp7as78hb31awxmvfwwihpv18";
+    sha256 = "0pv4s54cayvavdp6y30n3r1l5x83x9whyyd2v24y0dh224v3hbxi";
   };
 
   cmakeFlags = [ "-DBUILD_CSOUND_AC=0" ] # fails to find Score.hpp