fix(ci): set cancel-in-progress: false for GitHub Pages deployment

[Copilot]

The deploy job was failing with Deployment failed, try again later. from actions/deploy-pages@v4. A mid-flight cancellation (triggered on retry) left GitHub Pages in an error state, causing subsequent attempts to immediately fail at the status check.

Change

• .github/workflows/deploy.yml: cancel-in-progress: true → cancel-in-progress: false

concurrency:
  group: pages
  cancel-in-progress: false  # was: true

cancel-in-progress: false matches GitHub's official Pages workflow template — it queues new runs rather than killing active deployments, preventing the cascade failure.

[Copilot]

Pull request overview

This PR adjusts the GitHub Pages deployment workflow’s concurrency behavior to prevent mid-deployment cancellations from leaving Pages in an error state and causing subsequent deployments to fail.

Changes:

• Updated the Pages deployment workflow concurrency setting to queue runs instead of canceling in-progress deployments.

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