python312Packages.music-assistant-models: fix botched merge

pkgs/development/python-modules/music-assistant-models/default.nix

···
   src = fetchFromGitHub {
     owner = "music-assistant";
     repo = "models";
-    tag = "v${version}";
+    tag = version;
     hash = "sha256-keig18o32X53q/QcoaPO0o9AT4XTEZ+dQ3L6u6BVkLU=";
   };