[post-2.72.0] Bump pillow version to fix failed gh workflow.

[shunping]

PR #38071 is causing github workflow failure: https://github.com/apache/beam/actions/workflows/republish_released_docker_containers.yml

#18 16.70 ERROR: Cannot install None because these package versions have conflicting dependencies.
#18 16.70 
#18 16.70 The conflict is caused by:
#18 16.70     apache-beam 2.72.0 depends on pillow<13 and >=12.1.1
#18 16.70     The user requested (constraint) pillow==12.1.0

[gemini-code-assist]

Summary of Changes

Hello, 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 addresses a dependency conflict identified in the project's CI/CD pipeline. By bumping the Pillow version to 12.1.1, the changes ensure compatibility with the requirements defined for Apache Beam 2.72.0, thereby restoring the functionality of the affected GitHub workflow.

Highlights

• Dependency Update: Updated the Pillow library version from 12.1.0 to 12.1.1 across all Python container base image requirements.
• Workflow Fix: Resolved a dependency conflict in the GitHub Actions workflow that was preventing successful container builds.

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[shunping]

r: @Abacn @tvalentyn @Amar3tto

[github-actions]

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