fix: ignore quarantine for linux cask download

Library/Homebrew/cask/download.rb

@@ -114,3 +114,5 @@ module Cask
     end
   end
 end
+
+require "extend/os/cask/download"

Library/Homebrew/extend/os/cask/download.rb

@@ -0,0 +1,4 @@
+# typed: true
+# frozen_string_literal: true
+
+require "extend/os/linux/cask/download" if OS.linux?

Library/Homebrew/extend/os/linux/cask/download.rb

@@ -0,0 +1,13 @@
+# typed: true
+# frozen_string_literal: true
+
+module Cask
+  class Download
+    undef quarantine
+
+    def quarantine(_path)
+      opoo "Cannot quarantine download: No xattr available on linux." if @quarantine
+      nil
+    end
+  end
+end