Update unittest.yml

Author: Juntongkuki

.github/workflows/unittest.yml

@@ -18,7 +18,7 @@ jobs:
       - name: test_base
         run: |
           git clone https://github.com/Juntongkuki/tnlearn_actions
-          
+          cd tnlearn_actions/tests
 
       - name: run test_base
         run: python test_base.py