fix: fix Elixir 1.15 depreciations

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/service/git_status.ex

@@ -10,7 +10,7 @@ defmodule Mobilizon.Service.GitStatus do
 
              _ ->
                # Fallback on Mix version
-               Logger.warn("Could not read git commit hash, using Mix version code instead.")
+               Logger.warning("Could not read git commit hash, using Mix version code instead.")
                Mix.Project.config()[:version]
            end)
 

lib/service/notifier/email.ex

@@ -95,7 +95,7 @@ defmodule Mobilizon.Service.Notifier.Email do
   end
 
   defp can_send_activity?(activity, user, options) do
-    Logger.warn(
+    Logger.warning(
       "Can't check if user #{inspect(user)} can be sent an activity (#{inspect(activity)}) (#{inspect(options)})"
     )