Bump up version to 26.12 [reduced-it]

[nvauto]

Update cudf-spark-jni and cudf-spark-private dependency versions to 26.12.0-SNAPSHOT.

Checklists

Documentation

• Updated for new or modified user-facing features or behaviors
• No user-facing change

Testing

• Added or modified tests to cover new code paths
• Covered by existing tests
  (Please provide the names of the existing tests in the PR description.)
• Not required

Performance

• Tests ran and results are added in the PR description
• Issue filed with a link in the PR description
• Not required

performance results are not required for this metadata/version-only update.

[nvauto]

build

[greptile-apps]

Confidence Score: 4/5

[Low risk] Version number bump across build and documentation files.

The PR should not merge until the required rationale for the upstream SNAPSHOT changes is added to its description.

Findings

1.  Missing SNAPSHOT Update Rationale ▶

Summary

The PR advances Maven modules, upstream dependencies, CI defaults, and version examples from 26.10 to 26.12.

• The upstream SNAPSHOT changes lack the rationale required in the PR description.

_{Reviews (2) · Last reviewed commit: "Bump up version to 26.12"}

[NvTimLiu]

build

[NvTimLiu]

build