Update unittest.yml

Author: Juntongkuki

.github/workflows/unittest.yml

@@ -16,8 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: test_base
-        run:
+        run: |
           git clone https://github.com/Juntongkuki/tnlearn_actions
           cd tnlearn_actions/tests
-          date