docs: update latest news list

[euronymous-aithal]

moved the stale news items to previous news

What does this PR do ?

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Additional Information

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Summary by CodeRabbit

Release Notes

• Documentation
  • Reorganized previous news section with a collapsible interface for improved readability and navigation.
  • Updated news entries with the latest dates.

[coderabbitai]

📝 Walkthrough

Walkthrough

The README.md file's "Previous News" section is restructured into a new collapsible details block containing updated news entries from August, July, and May 2025, replacing the previous news block entirely.

Changes

Cohort / File(s)	Summary
Documentation Updates README.md	Replaced the existing "Previous News" block with a new collapsible details section containing updated news entries (8/15/2025, 7/31/2025, 7/25/2025, 5/14/2025) positioned after the On-policy Distillation entry

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• NVIDIA-NeMo/RL#1301: Modifies README News section with overlapping news entries from August, July, and May 2025
• NVIDIA-NeMo/RL#1091: Modifies README's "Previous News" collapsible section with similar block restructuring

Suggested labels

CI:docs

Suggested reviewers

• terrykong
• snowmanwwg

Pre-merge checks and finishing touches

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title Check	❓ Inconclusive	The PR title "Update README.md" is extremely generic and does not convey what specifically was changed in the README. According to the change summary, the PR reorganizes news items by replacing the "Previous News" block with a new collapsible Details section containing updated entries. However, the title provides no indication of this specificity—it could refer to any possible README modification. The title uses non-descriptive terminology that fails to communicate the meaningful nature of the change to someone scanning the commit history, making it difficult to understand what the PR actually accomplishes at a glance.	Update the PR title to be more specific and descriptive about the actual change. For example, consider using a title like "Move stale news items to collapsible section in README" or "Reorganize previous news as collapsible details block in README" to clearly convey the nature and intent of the modification.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.
Test Results For Major Changes	✅ Passed	The PR contains a minor documentation change that reorganizes news items in the README.md file by moving stale news entries into a collapsible "Previous News" section. This is purely a documentation/content update with no code changes, new features, breaking changes, or significant refactoring. The estimated code review effort is marked as "Low," which aligns with the minor nature of this change. According to the check instructions, the pass criterion includes scenarios where "the changes are minor," and this PR clearly meets that criterion.

✨ Finishing touches

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• Post copyable unit tests in a comment
• Commit unit tests in branch euronymous-aithal-patch-2

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