[DOC] update the download doc [skip ci]

[nvliyuan]

This pr cherry pick changes from #13638, since #13593 merged firstly
Signed-off-by: liyuan yuali@nvidia.com

[greptile-apps]

Greptile Overview

Greptile Summary

This PR cherry-picks release notes updates from PR #13638 after PR #13593 merged first. The changes replace generic performance and enhancement descriptions with specific 25.10.0 release features.

Major changes:

• Added Delta Lake liquid clustering read/write/optimize support
• Added Delta Lake deletion vector support with documented caveats (useMetadataRowIndex=false requirement and coalescing file reader CPU fallback)
• Updated Iceberg feature descriptions to focus on insert operations
• Added Spark 4.0.1 and CUDA 13 support mentions
• Added uuid function support and stddev/variance performance improvements

Confidence Score: 5/5

• This PR is safe to merge with no risk - it's a documentation-only change with [skip ci] tag
• Score reflects that this is purely a documentation update cherry-picking approved changes from another PR, with no code changes, no build impact, and verified feature descriptions matching commit history
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
docs/download.md	5/5	Updated release notes to reflect 25.10.0 features - Delta Lake liquid clustering, deletion vectors, Iceberg improvements, Spark 4.0.1, and CUDA 13 support

Sequence Diagram

sequenceDiagram
    participant Author as PR Author
    participant Doc as docs/download.md
    participant PR13638 as PR #13638
    participant PR13593 as PR #13593
    
    Note over Author,PR13593: Cherry-pick scenario
    
    Author->>PR13638: Create PR with release notes
    Author->>PR13593: Create competing PR
    PR13593->>Doc: Merge first (updates download.md)
    
    Note over Author,Doc: PR #13638 changes need to be applied
    
    Author->>PR13695: Create this PR (cherry-pick)
    PR13695->>Doc: Update release notes section
    Doc->>Doc: Replace generic notes with specific 25.10.0 features
    
    Note over Doc: Updated with:<br/>- Delta Lake liquid clustering<br/>- Deletion vector support<br/>- Iceberg improvements<br/>- Spark 4.0.1 support<br/>- CUDA 13 support

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[nvliyuan]

build

[greptile-apps]

Greptile Overview

Greptile Summary

This PR cherry-picks documentation changes from PR #13638 after PR #13593 was merged first. The changes refactor the v25.10.0 release notes to be more user-focused and readable.

Key improvements:

• Replaced technical implementation details with user-facing feature descriptions
• Highlighted major features: Delta Lake liquid clustering, deletion vector support, Spark 4.0.1 support, and CUDA 13 support
• Made Delta Lake deletion vector caveats more explicit and actionable
• Simplified the release notes structure for better readability

The changes are purely documentation updates with no code modifications.

Confidence Score: 5/5

• This PR is completely safe to merge with zero risk
• Documentation-only PR that improves release notes clarity and user experience. The changes are well-formatted, grammatically correct, and properly structured. No code changes means no risk of runtime issues.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
docs/download.md	5/5	Release notes updated to be more concise and user-focused, highlighting key features like Delta Lake liquid clustering, Spark 4.0.1, and CUDA 13 support

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant PR13638 as PR #13638
    participant PR13593 as PR #13593 (merged first)
    participant Main as main branch
    participant PR13695 as PR #13695 (this PR)
    
    Dev->>PR13638: Create doc updates
    Dev->>PR13593: Create doc updates
    PR13593->>Main: Merge first
    Note over PR13638: Conflicts with main
    Dev->>PR13695: Cherry-pick changes from PR #13638
    Note over PR13695: Update release notes with<br/>user-friendly descriptions
    PR13695->>Main: Ready to merge

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