Fix PostRelease Nightly Snapshot job

[Amar3tto]

Fixes #30505
Successful run: https://github.com/apache/beam/actions/runs/22183886247

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Summary of Changes

Hello @Amar3tto, 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 an issue with the PostRelease Nightly Snapshot job by updating a Flink runner dependency. The change ensures that the quickstart Java Flink local task uses the correct Flink version, resolving previous build failures and allowing the nightly snapshot job to complete successfully.

Highlights

• Flink Version Update: Updated the Flink runner dependency in the release/build.gradle.kts file from version 1.20 to 2.0 for the runQuickstartJavaFlinkLocal task.

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Changelog

• release/build.gradle.kts
  • Updated Flink runner version from 1.20 to 2.0 for the runQuickstartJavaFlinkLocal task.

Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/run_rc_validation_java_quickstart.yml

Activity

• The pull request was opened by Amar3tto to fix issue The PostRelease Nightly Snapshot job is flaky #30505.
• A successful run of the GitHub Actions workflow was linked, indicating the fix is working.

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[Abacn]

Thanks!

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