ci(tests): include the matrix group as well to actually run tests

Author: thazhemadam

.github/workflows/CI.yml

@@ -29,5 +29,6 @@ jobs:
           - "Downstream"
     uses: "SciML/.github/.github/workflows/tests.yml@v1"
     with:
+      group: "${{ matrix.group }}"
       julia-version: "${{ matrix.version }}"
     secrets: "inherit"