Pin CI gh-aw setup to a compiler version that supports tools.cli-proxy

[Copilot]

CI was compiling these workflows with an older gh aw binary than intended, which rejected tools.cli-proxy: true even though that frontmatter is valid in newer releases. This change makes the compile job install the intended compiler version explicitly instead of falling back to an incompatible default.

• Problem

  • github/gh-aw-actions/setup-cli was invoked without its required version input.
  • The workflow also used gh_token instead of the action’s supported github-token input.
  • As a result, CI installed gh aw v0.71.1, and gh aw compile --dir workflows failed on:
    • workflows/copilot-token-audit.md
    • workflows/copilot-token-optimizer.md

• Change

  • Update .github/workflows/ci.yml to pass the action’s supported inputs explicitly:
    • version: v0.71.4
    • github-token: ${{ secrets.GITHUB_TOKEN }}
  • Keep the workflow sources unchanged; the fix is in CI/tooling alignment, not workflow syntax.

• Effect

  • The compile job now uses a gh aw version that recognizes tools.cli-proxy: true.
  • CI behavior now matches the workflow syntax already present in the repository.

• Relevant snippet

  - name: Set up gh-aw CLI
    uses: github/gh-aw-actions/setup-cli@f8495a686e66770ae977f82732f34d7340ee42a4
    with:
      version: v0.71.4
      github-token: ${{ secrets.GITHUB_TOKEN }}