Chore: [AEA-0000] - use action to sync copilot

[anthony-nhs]

Summary

• Routine Change

Details

• use action to sync copilot

[github-actions]

This PR is linked to a ticket in an NHS Digital JIRA Project. Here's a handy link to the ticket:

AEA-0000

[Copilot]

Pull request overview

Updates the repository’s “Sync Copilot Instructions” GitHub Actions workflow to use a dedicated action for syncing shared Copilot instructions (and opening a PR), rather than calling a reusable workflow.

Changes:

• Replace reusable-workflow invocation with a single job that runs the sync action and can create PRs.
• Update the scheduled trigger time and simplify workflow_dispatch (remove custom inputs).
• Add job-level permissions/environment needed for PR creation.

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💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

runs-on: ubuntu-latest is the only workflow runner in this repo that tracks the moving ubuntu-latest label; the other workflows pin to ubuntu-22.04. Pinning the runner here as well (e.g., ubuntu-22.04) avoids unexpected breakages when GitHub updates the default image.

Suggested change

	runs-on: ubuntu-latest
	runs-on: ubuntu-22.04

[Copilot]

The action reference NHSDigital/eps-copilot-instructions@initial_instructions is a mutable ref (branch/tag), which is a supply-chain risk and can change behavior without this repo changing. Prefer pinning to an immutable commit SHA (or at least a protected, versioned tag) similar to other workflows in this repo.

Suggested change

	uses: NHSDigital/eps-copilot-instructions@initial_instructions
	uses: NHSDigital/eps-copilot-instructions@0123456789abcdef0123456789abcdef01234567

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud