fix gettext for percentages

lib/cannery_web/live/ammo_group_live/index.ex

@@ -194,7 +194,7 @@ defmodule CanneryWeb.AmmoGroupLive.Index do
   end
 
   defp get_value_for_key(:remaining, ammo_group),
-    do: "#{ammo_group |> Ammo.get_percentage_remaining()}%"
+    do: gettext("%{percentage}%", percentage: ammo_group |> Ammo.get_percentage_remaining())
 
   defp get_value_for_key(:actions, ammo_group) do
     assigns = %{ammo_group: ammo_group}

lib/cannery_web/live/ammo_group_live/show.html.heex

@@ -16,7 +16,7 @@
 
     <span class="rounded-lg title text-lg">
       <%= gettext("Percentage left:") %>
-      <%= "#{@ammo_group |> Ammo.get_percentage_remaining()}%" %>
+      <%= gettext("%{percentage}%", percentage: @ammo_group |> Ammo.get_percentage_remaining()) %>
     </span>
 
     <%= if @ammo_group.notes do %>