Update python SDK container (#32501)

diff --git a/sdks/python/apache_beam/runners/dataflow/internal/names.py b/sdks/python/apache_beam/runners/dataflow/internal/names.py
index 5305c14..044e144 100644
--- a/sdks/python/apache_beam/runners/dataflow/internal/names.py
+++ b/sdks/python/apache_beam/runners/dataflow/internal/names.py
@@ -34,6 +34,6 @@
 # Unreleased sdks use container image tag specified below.
 # Update this tag whenever there is a change that
 # requires changes to SDK harness container or SDK harness launcher.
-BEAM_DEV_SDK_CONTAINER_TAG = 'beam-master-20240917'
+BEAM_DEV_SDK_CONTAINER_TAG = 'beam-master-20240918'
 
 DATAFLOW_CONTAINER_IMAGE_REPOSITORY = 'gcr.io/cloud-dataflow/v1beta3'