Add resolute to contribution guide.

[aramprice]

NOTE: this repository uses a "Merge Forward" strategy

Changes should be made in the earliest applicable branch, and
merged forward through subsequent branches.

1. Create a PR into the oldest branch (ubuntu-<short_name>)
2. After this PR has been merged create a merge-to-<next_short_name> branch
3. Merge ubuntu-<short_name> into merge-to-<next_short_name>
4. Create a PR to merge merge-to-<next_short_name> into ubuntu-<next_short_name>
5. Repeat as needed for subsequent branches

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

Walkthrough

CONTRIBUTING.md is updated to reflect current stemcell branch support. The "As of" date is refreshed and Ubuntu Resolute (ubuntu-resolute) is added to the list of supported branches, which now includes Jammy and Noble. This is a straightforward documentation maintenance change to keep the contributor guidance aligned with currently supported platforms.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description contains only the merge-forward strategy template but lacks any actual context about the changes made (what was added, why, or which file was modified).	Add a description explaining what changes were made (e.g., 'Added ubuntu-resolute to CONTRIBUTING.md supported branches list') and why these changes are necessary.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Add resolute to contribution guide' accurately reflects the main change: adding Ubuntu Resolute to the CONTRIBUTING.md file's supported branches list.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch update-contributing

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[Copilot]

Pull request overview

Updates the contribution guide’s list of currently supported Ubuntu stemcell lines/branches to include the new ubuntu-resolute line, keeping the documentation aligned with the repository’s branching strategy.

Changes:

• Refreshes the “As of” date in the supported-branches section.
• Adds “Ubuntu Resolute / ubuntu-resolute” to the supported stemcell lines list.

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