Pass the GH token to tests

[asgrim]

Occasionally, tests will fail because we are using GH API without an auth token. I suspect making sure the GITHUB_TOKEN in CI will eliminate the issue.

https://github.com/php/pie/actions/runs/12572758302/job/35045103222?pr=166

There was 1 error:

1) Php\PieIntegrationTest\Downloading\GithubPackageReleaseAssetsTest::testDeterminingReleaseAssetUrlForWindows
Composer\Downloader\TransportException: The "https://api.github.com/repos/asgrim/example-pie-extension/releases/tags/2.0.2" file could not be downloaded (HTTP/2 403 ):
{"message":"API rate limit exceeded for 13.91.71.16. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)","documentation_url":"htt...

D:\a\pie\pie\src\Downloading\GithubPackageReleaseAssets.php:80
D:\a\pie\pie\src\Downloading\GithubPackageReleaseAssets.php:38
D:\a\pie\pie\test\integration\Downloading\GithubPackageReleaseAssetsTest.php:68

[asgrim]

Didn't work 🤦 https://github.com/php/pie/actions/runs/12686877443/job/35360110779

[Bellangelo]

Hi @asgrim, I think I figured out why your fix didn't work originally. Please check: #174