wireshark: set Darwin minimum SDK version to 12.0

Required by Qt 6. CMake will error without this.

pkgs/applications/networking/sniffers/wireshark/default.nix

@@ -9,6 +9,7 @@
   buildPackages,
   c-ares,
   cmake,
+  darwinMinVersionHook,
   fixDarwinDylibNames,
   flex,
   gettext,
@@ -147,6 +148,8 @@ stdenv.mkDerivation rec {
   ]
   ++ lib.optionals stdenv.hostPlatform.isDarwin [
     gmp
+    # Required by Qt 6
+    (darwinMinVersionHook "12.0")
   ];
 
   strictDeps = true;