Upgrade black version (#7089)

stubs/ldap3/ldap3/strategy/reusable.pyi

@@ -14,6 +14,7 @@ class ReusableStrategy(BaseStrategy):
     def receiving(self) -> None: ...
     def get_stream(self) -> None: ...
     def set_stream(self, value) -> None: ...
+
     class ConnectionPool:
         def __new__(cls, connection): ...
         name: Any
@@ -37,12 +38,14 @@ class ReusableStrategy(BaseStrategy):
         def start_pool(self): ...
         def create_pool(self) -> None: ...
         def terminate_pool(self) -> None: ...
+
     class PooledConnectionThread(Thread):
         daemon: bool
         worker: Any
         master_connection: Any
         def __init__(self, worker, master_connection) -> None: ...
         def run(self) -> None: ...
+
     class PooledConnectionWorker:
         master_connection: Any
         request_queue: Any