Fix indentation of Celery email settings

aleksis/core/settings.py

@@ -374,9 +374,9 @@ if _settings.get("celery.enabled", False):
     CELERY_CACHE_BACKEND = "django-cache"
     CELERY_BEAT_SCHEDULER = "django_celery_beat.schedulers:DatabaseScheduler"
 
-if _settings.get("celery.email", False):
-   INSTALLED_APPS += ("djcelery_email",)
-   EMAIL_BACKEND = "djcelery_email.backends.CeleryEmailBackend"
+    if _settings.get("celery.email", False):
+        INSTALLED_APPS += ("djcelery_email",)
+        EMAIL_BACKEND = "djcelery_email.backends.CeleryEmailBackend"
 
 PWA_APP_NAME = "AlekSIS"  # dbsettings
 PWA_APP_DESCRIPTION = "AlekSIS – The free school information system"  # dbsettings