docs: add release runs to front page readme for 0.5

[terrykong]

What does this PR do ?

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• Did you write any new necessary tests?
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• Did you add or update any necessary documentation? Visit our Document Development Guide for how to write, build and test the docs.

Additional Information

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Summary by CodeRabbit

• Documentation
  • Release run metrics are now accessible via a direct link in the release information.

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📝 Walkthrough

Walkthrough

README.md is updated with a minor content change in the News section: the "Coming soon" placeholder for the release run is replaced with a link to Google Colab displaying release run metrics.

Changes

Cohort / File(s)	Summary
Documentation Update README.md	News section: replaced "Coming soon" placeholder with Google Colab link for release run metrics display.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• docs: add v0.4 news and minor touch up to front page readme #1268: Both PRs modify the README's News section with updates to news bullets.
• docs: update readme post 0.5 #1856: Both PRs update README news content and add Colab release-run links in similar contexts.

Suggested labels

documentation

Suggested reviewers

• chtruong814
• yuki-97

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding a release runs link to the README front page for version 0.5.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Test Results For Major Changes	✅ Passed	This PR contains only minor documentation changes to README.md, specifically a single line modification updating the News section with a Google Colab link. No code, logic, or structural changes are present.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch tk/0.5-release-runs

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