Update python SDK container image

[tarun-google]

Update container image to newly released version

https://pantheon.corp.google.com/artifacts/docker/cloud-dataflow/us/gcr.io/v1beta3%2Fbeam_python3.12_sdk/sha256:54ada041c8826261d4c1a34542803324f7b2d58930c077ef5ac22b0f410ebc5f

GitHub Actions Tests Status (on master branch)

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[gemini-code-assist]

Summary of Changes

Hello @tarun-google, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the Python SDK container image to a newly released version. This ensures that the Dataflow runner utilizes the most current SDK harness for unreleased SDKs, incorporating the latest features, fixes, and improvements into the development environment.

Highlights

• Python SDK Container Image Update: The BEAM_DEV_SDK_CONTAINER_TAG in sdks/python/apache_beam/runners/dataflow/internal/names.py has been updated to a newer version, specifically from 'beam-master-20250917' to 'beam-master-20250930'.

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[tarun-google]

R: @tvalentyn

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control. If you'd like to restart, comment assign set of reviewers

[tarun-google]

Run Python PreCommit 3.9

[tarun-google]

Run Python PreCommit 3.11

[tarun-google]

Run Python_Transforms PreCommit 3.9

[tarun-google]

Run Python_ML PreCommit 3.12

[tvalentyn]

Checked that containers have been released and failures do not appear to be related to the change.