Pleroma Emoji mix task: fix gradient error

lib/mix/tasks/pleroma/emoji.ex: The tuple {:cwd, pack_path} on line 114 is expected to have type :cooked
| :keep_old_files
| :memory
| :verbose
| {:cwd, list(char())}
| {:file_filter, (record(:zip_file) -> boolean())}
| {:file_list, list(:file.name())} but it has type {:cwd, binary()}

lib/mix/tasks/pleroma/emoji.ex

@@ -111,7 +111,7 @@ defmodule Mix.Tasks.Pleroma.Emoji do
 
         {:ok, _} =
           :zip.unzip(binary_archive,
-            cwd: pack_path,
+            cwd: String.to_charlist(pack_path),
             file_list: files_to_unzip
           )