Update readme.md

[Vitnir]

Update README link to new documentation URL after repository relocation, replacing outdated link that was never updated.

Summary by CodeRabbit

• Documentation
  • Updated the Usage documentation link to direct users to the latest external documentation resource.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 667e9bed-5bc6-4711-947f-6c300d8aefd2

📥 Commits

Reviewing files that changed from the base of the PR and between 865d9cc and 106c75f.

📒 Files selected for processing (1)

• readme.md

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Walkthrough

The README's "Usage" link was updated to redirect from a local relative markdown file path to an external GitHub documentation repository URL, consolidating documentation references.

Changes

Cohort / File(s)	Summary
Documentation Link Update readme.md	Updated "Usage" link from local relative path (./api/docs/public/how-to-use-the-api.md) to external GitHub documentation URL (https://github.com/unraid/docs).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A link once local, now points afar,
To docs in the GitHub star,
One line changed, but oh what cheer,
The path to knowledge, crystal clear! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title 'Update readme.md' is vague and generic, using non-descriptive terms that don't convey meaningful information about the specific change (updating a documentation link after repository relocation).	Use a more specific title that describes the actual change, such as 'Update documentation link in README to point to new GitHub docs repository' or 'Fix outdated API documentation link in README'.

✅ Passed checks (4 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 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

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