feat: update ai-ready plugin ref tag

[SimonGolms]

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• I have read and followed the Guidance for submissions involving paid services.
• My contribution adds a new instruction, prompt, agent, skill, workflow, or canvas extension file in the correct directory.
• The file follows the required naming convention.
• The content is clearly structured and follows the example format.
• I have tested my instructions, prompt, agent, skill, workflow, or canvas extension with GitHub Copilot.
• I have run npm start and verified that README.md is up to date.
• I am targeting the main branch for this pull request.

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Description

Changes ref of the external ai-ready plugin from a commit sha to a release tag.

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Type of Contribution

• New instruction file.
• New prompt file.
• New agent file.
• New plugin.
• New skill file.
• New agentic workflow.
• New canvas extension.
• Update to existing instruction, prompt, agent, plugin, skill, workflow, or canvas extension.
• Other (please specify):

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Additional Notes

Caused by #1774
Ref: johnpapa/ai-ready#26

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By submitting this pull request, I confirm that my contribution abides by the Code of Conduct and will be licensed under the MIT License.

[github-actions]

🔒 PR Risk Scan Results

Scanned 2 changed file(s).

Severity	Count
🔴 High	0
🟠 Medium	0
ℹ️ Info	0

✅ No matching risk patterns were detected in changed files.

This is an automated soft-gate report. Findings indicate review targets and do not block merge by themselves.

[github-actions]

⚠️ External plugin PR checks need maintainer follow-up

• Changed entries detected: 1
• Workflow state label: awaiting-review

Per-plugin quality summary

Plugin	vally lint	install smoke test	version match	overall	source tree
ai-ready	pass	pass	infra_error	infra_error	v1.1.0

Gate output details

ai-ready - vally lint (pass)

0 skill(s) linted

ai-ready - install smoke test (pass)

Install smoke test succeeded. Verified /tmp/external-plugin-quality-ZdqtLZ/copilot-home/.copilot/installed-plugins/external-plugin-intake/ai-ready/plugin.json.

ai-ready - version match (infra_error)

- v1.1.0: Unable to read ".github/plugin/.github/plugin/plugin.json" at "v1.1.0": fatal: invalid object name 'v1.1.0'.

• ai-ready: vally-lint=pass, install-smoke=pass, version-match=infra_error, overall=infra_error

[aaronpowell]

The Copilot harnesses now all support using either a SHA or a ref for the install (we prefer using SHA as that's immutable).

I also note that this goes to the 1.1.0 tag whereas the current is the SHA for the 1.0.0 tag, and the plugin version isn't bumped.

Tagging @johnpapa as it's his plugin - do you want it bumped to the 1.1.0 release?