Update docs/configuring-playbook-bot-draupnir.md: add "recommended" label to the section

Unlike Mjolnir the step is no longer required though it is recommended.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-playbook-bot-draupnir.md

@@ -78,7 +78,7 @@ ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,ensure-matrix-use
 
 The `ensure-matrix-users-created` playbook tag makes the playbook automatically create the bot's user account.
 
-### Make sure the account is free from rate limiting
+### Make sure the account is free from rate limiting (recommended)
 
 If your homeserver's implementation is Synapse, you will need to prevent it from rate limiting the bot's account. **This is a heavily recomended step. If you do not configure it, Draupnir performance will be degraded.**