Update __init__.py

update version string

Author: yunchu

src/otx/__init__.py

@@ -3,5 +3,5 @@
 # Copyright (C) 2021-2023 Intel Corporation
 # SPDX-License-Identifier: Apache-2.0
 
-__version__ = "1.4.0rc0"
+__version__ = "1.4.0rc1"
 # NOTE: Sync w/ src/otx/api/usecases/exportable_code/demo/requirements.txt on release