docs(readme): update convergence table, latest news, and outdated links

[sbhavani]

Description

Updates README add missing format support documentation, update news section, and fix broken/outdated links.

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refactoring

Changes

• Add MXFP8 and NVFP4 format support to highlights and description
• Update FP8 convergence table with MXFP8 results from arxiv paper
• Remove outdated JAX Toolbox links and "available on request" entries
• Update Docker container versions to 26.01
• Fix DeepSpeed and Lightning integration links
• Add Nemotron 3 paper to Latest News
• Add quickstart notebook link after PyTorch example

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[greptile-apps]

Greptile Overview

Greptile Summary

This PR updates the README with several documentation improvements, primarily focused on new format support and keeping information current.

Key changes:

• Added MXFP8 and NVFP4 format support documentation to highlights and description sections
• Updated FP8 convergence table with new Megatron Core results (LLM-8B, MoE-16B)
• Removed outdated "Available on request" entries and JAX Toolbox specific model entries from convergence table
• Updated Docker container versions from 25.08 to 26.01
• Fixed integration links for DeepSpeed and Lightning
• Added Nemotron 3 paper to Latest News section
• Removed "Coming soon!" status from several integrations

Issue found:

• The newly added quickstart notebook link (line 97) references a non-existent file docs/examples/quickstart.ipynb

Confidence Score: 4/5

• This PR is mostly safe to merge after fixing the broken notebook link
• The changes are documentation-only and improve accuracy by updating outdated information. However, the score is 4 instead of 5 because one of the newly added links references a non-existent file, which would result in a 404 error for users
• README.rst line 97 needs attention - the quickstart notebook link must be fixed before merging

Important Files Changed

Filename	Overview
README.rst	Documentation updates including MXFP8/NVFP4 support, convergence table updates, Docker version updates, and link fixes; one broken notebook link found

Sequence Diagram

sequenceDiagram
    participant Author as PR Author
    participant README as README.rst
    participant User as Documentation Reader
    
    Author->>README: Add MXFP8/NVFP4 format support info
    Author->>README: Update FP8 convergence table
    Author->>README: Remove outdated JAX Toolbox entries
    Author->>README: Update Docker versions (25.08 → 26.01)
    Author->>README: Fix DeepSpeed & Lightning links
    Author->>README: Add Nemotron 3 paper to Latest News
    Author->>README: Add quickstart notebook link (line 97)
    
    Note over README: ⚠️ quickstart.ipynb does not exist
    
    User->>README: Click quickstart notebook link
    README-->>User: 404 Not Found Error
    
    Note over Author,User: Fix required: Create notebook or update link

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[greptile-apps]

_{1 file reviewed, 1 comment}

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[greptile-apps]

The referenced quickstart.ipynb file does not exist in docs/examples/. The actual notebooks in that directory are fp8_primer.ipynb, advanced_optimizations.ipynb, and te_jax_integration.ipynb. Consider using one of these existing notebooks or creating the quickstart notebook before merging.