chore: migrate openchoreo container registry

[chathuranga95]

Purpose

This PR updates the openchoreo container registry related to the backstage plugins.
Related: openchoreo/openchoreo#4899

Goals

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Approach

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User stories

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Release note

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Documentation

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Training

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Certification

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Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines? yes/no
• Ran FindSecurityBugs plugin and verified report? yes/no
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets? yes/no

Samples

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Summary by CodeRabbit

• Documentation
  • Updated the local development instructions to use the Helm chart hosted at cr.openchoreo.dev.

[github-actions]

No changeset detected

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ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: 2d33595f-4f7f-4d81-b524-38687f0191cf

📥 Commits

Reviewing files that changed from the base of the PR and between 3275f94 and fb9e9bd.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

Two Helm upgrade commands in the local development instructions now use the control plane chart hosted at cr.openchoreo.dev instead of ghcr.io.

Changes

Local development setup

Layer / File(s)	Summary
Update local Helm chart references README.md	The single-cluster setup and catalog-sync instructions now reference the control plane Helm chart at cr.openchoreo.dev.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to fb9e9

The updated local setup commands reference an accessible chart. No issue identified here prevents merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description states the purpose and links a related issue, but most required sections contain only template prompts. It does not describe the README changes, goals, approach, documentation impact, …	Complete the relevant template sections. Describe the change to the Helm commands in README.md and explain its purpose. Add applicable test information and mark sections that do not apply as N/A with a brief reason.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: migrating the OpenChoreo container registry.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.

Full details: Description check

Explanation

The description states the purpose and links a related issue, but most required sections contain only template prompts. It does not describe the README changes, goals, approach, documentation impact, or testing.

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