fix(django): Add sync_capable to SentryWrappingMiddleware

Fixes #3506

sentry_sdk/integrations/django/middleware.py

@@ -125,6 +125,7 @@ def sentry_wrapped_method(*args, **kwargs):
     class SentryWrappingMiddleware(
         _asgi_middleware_mixin_factory(_check_middleware_span)  # type: ignore
     ):
+        sync_capable = getattr(middleware, "sync_capable", True)
         async_capable = DJANGO_SUPPORTS_ASYNC_MIDDLEWARE and getattr(
             middleware, "async_capable", False
         )