try switching to v8 actions to get artifacts

Author: hjwp

.github/workflows/tests.yml

@@ -35,6 +35,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - id: foo
-        uses: hjwp/github-actions@v6
+        uses: hjwp/github-actions@v8
         with:
           test_chapter: ${{ matrix.test_chapter }}