Bump buildpacks/github-actions from 5.6.0 to 5.7.3

Bumps [buildpacks/github-actions](https://github.com/buildpacks/github-actions) from 5.6.0 to 5.7.3.
- [Release notes](https://github.com/buildpacks/github-actions/releases)
- [Commits](buildpacks/github-actions@v5.6.0...v5.7.3)

---
updated-dependencies:
- dependency-name: buildpacks/github-actions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -36,7 +36,7 @@ jobs:
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_TOKEN }}
     - id: setup-pack
-      uses: buildpacks/github-actions/setup-pack@v5.6.0
+      uses: buildpacks/github-actions/setup-pack@v5.7.3
     - id: package
       run: |
         #!/usr/bin/env bash