fix: add debug output for ARTELYS_LICENSE in test step

Author: eminyouskn

.github/workflows/linux-build.yml

@@ -53,6 +53,7 @@ jobs:
       - name: Test
         run: |
           export ARTELYS_LICENSE_DEBUG=1
+          echo $ARTELYS_LICENSE
           python -m pip install pytest numpy scipy highsbox llvmlite tccbox knitro
           python -m pytest tests -v