Update PPA docs link to its canonical destination

[horgh]

Summary

The Links workflow failed because the Launchpad PPA documentation URL in README.dev.md now 301-redirects:

https://documentation.ubuntu.com/launchpad/user/reference/packaging/ppas/ppa/
  -> https://ubuntu.com/docs/launchpad/user/reference/packaging/ppas/ppa/

Since lychee.toml sets max_redirects = 0 (so moved links get surfaced and updated to their canonical destination), this fails CI. This updates the link to the canonical ubuntu.com/docs URL, which returns 200 with no further redirect.

Test plan

• lychee --no-progress './README.dev.md' → 3 OK, 0 errors.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated the PPA documentation link in the developer README to point to the current Ubuntu docs page.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 5cf99b20-8539-464a-9aad-7ab4b2763c61

📥 Commits

Reviewing files that changed from the base of the PR and between fa7cfe9 and fe7dd9f.

📒 Files selected for processing (1)

• README.dev.md

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📝 Walkthrough

Walkthrough

Updates the PPA documentation URL in README.dev.md from documentation.ubuntu.com to ubuntu.com/docs/launchpad/user/reference/packaging/ppas/ppa/.

Changes

PPA Doc Link Update

Layer / File(s)	Summary
PPA reference URL README.dev.md	Replaces the PPA documentation link with the updated ubuntu.com/docs/launchpad/user/reference/packaging/ppas/ppa/ URL.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~1 minutes

Poem

A link hopped light in README land,
From old docs path to newer stand.
The rabbit nods, ears up and bright,
To ubuntu.com by moonlit light.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and accurately summarizes the main change to the PPA documentation link.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch wstorey/fix-links

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[gemini-code-assist]

Code Review

This pull request updates a documentation URL in README.dev.md to point to the correct Ubuntu documentation path. There are no review comments, and I have no feedback to provide.

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