fix resolution of mix tasks

lib/pleroma/release_tasks.ex

@@ -25,7 +25,7 @@ defp mix_task(task, args) do
         module = Module.split(module)
 
         match?(["Mix", "Tasks", "Pleroma" | _], module) and
-          String.downcase(List.last(module)) == task
+          task_match?(module, task)
       end)
 
     if module do
@@ -35,6 +35,13 @@ defp mix_task(task, args) do
     end
   end
 
+  defp task_match?(module_path, task) do
+    module_path
+    |> Enum.join(".")
+    |> String.downcase()
+    |> String.ends_with?(String.downcase(task))
+  end
+
   def migrate(args) do
     Mix.Tasks.Pleroma.Ecto.Migrate.run(args)
   end