ci : Downgrade CUDA versions for compatibility

[ehfd]

Overview

Follow-up to #21122; fix #21122 (comment).

@CISC @taronaeo

Additional information

Fix various forms of installed environments by reducing the CUDA version of Docker containers, from 12.8.1 to 12.5.1 for CUDA 12, and 13.1.1 to 13.0.1 for CUDA 13.

Requirements

• I have read and agree with the contributing guidelines: YES
• AI usage disclosure: NO

[CISC]

Part of the point of bumping to 12.8.x was also to support Blackwell on CUDA12, at some point people will just have to update their drivers or build their own images if they can't.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Updates the CUDA versions used for Docker/CI builds to improve compatibility with installed environments, following up on #21122 feedback.

Changes:

• Downgrade CUDA 12 container builds from 12.8.1 to 12.5.1 in CI and default Dockerfile args.
• Downgrade CUDA 13 container builds from 13.1.1 to 13.0.1 in CI build matrix.
• Update Docker documentation to reflect the new CUDA image versions.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
docs/docker.md	Updates the documented CUDA_VERSION default behavior/version(s) for Docker images.
.github/workflows/docker.yml	Adjusts CI build matrix to build CUDA 12/13 images with downgraded CUDA versions.
.devops/cuda.Dockerfile	Changes the default CUDA_VERSION build arg to 12.5.1.

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[ehfd]

Yeah, I am also conflicted on this matter.

But I guess Blackwell folks are more likely to use CUDA 13?

[ehfd]

Yeah, after some more thinking, I won't proceed.