Fix import order

Author: Fizzadar

synapse/storage/databases/main/receipts.py

@@ -30,12 +30,12 @@
 from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
 from synapse.replication.tcp.streams import ReceiptsStream
 from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
-from synapse.storage.databases.main.stream import StreamWorkerStore
 from synapse.storage.database import (
     DatabasePool,
     LoggingDatabaseConnection,
     LoggingTransaction,
 )
+from synapse.storage.databases.main.stream import StreamWorkerStore
 from synapse.storage.engines import PostgresEngine
 from synapse.storage.engines._base import IsolationLevel
 from synapse.storage.util.id_generators import (