fix type

Author: sentrivana

sentry_sdk/integrations/graphene.py

@@ -4,6 +4,7 @@
 from sentry_sdk.consts import OP
 from sentry_sdk.integrations import _check_minimum_version, DidNotEnable, Integration
 from sentry_sdk.scope import should_send_default_pii
+from sentry_sdk.traces import StreamedSpan
 from sentry_sdk.tracing_utils import has_span_streaming_enabled
 from sentry_sdk.utils import (
     capture_internal_exceptions,