build(deps): bump github/gh-aw in the actions group

Bumps the actions group with 1 update: [github/gh-aw](https://github.com/github/gh-aw).


Updates `github/gh-aw` from 0.71.5 to 0.73.0
- [Release notes](https://github.com/github/gh-aw/releases)
- [Changelog](https://github.com/github/gh-aw/blob/main/CHANGELOG.md)
- [Commits](github/gh-aw@v0.71.5...v0.73.0)

---
updated-dependencies:
- dependency-name: github/gh-aw
  dependency-version: 0.73.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/copilot-setup-steps.yml

@@ -21,6 +21,6 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v6
       - name: Install gh-aw extension
-        uses: github/gh-aw/actions/setup-cli@v0.71.5
+        uses: github/gh-aw/actions/setup-cli@v0.73.0
         with:
           version: v0.50.1