Handle sending mail more properly

With custom sentry reporting issues

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

lib/graphql/resolvers/participant.ex

@@ -70,7 +70,7 @@ defmodule Mobilizon.GraphQL.Resolvers.Participant do
           participant,
           Map.get(args, :locale, "en")
         )
-        |> Email.Mailer.deliver_later()
+        |> Email.Mailer.send_email_later()
       end
 
       {:ok, participant}

lib/graphql/resolvers/user.ex

@@ -358,11 +358,11 @@ defmodule Mobilizon.GraphQL.Resolvers.User do
          {:ok, %User{} = user} <- Users.update_user_email(user, new_email) do
       user
       |> Email.User.send_email_reset_old_email()
-      |> Email.Mailer.deliver_later()
+      |> Email.Mailer.send_email_later()
 
       user
       |> Email.User.send_email_reset_new_email()
-      |> Email.Mailer.deliver_later()
+      |> Email.Mailer.send_email_later()
 
       {:ok, user}
     else