chore: Update tests.yml

Signed-off-by: Diogo Goncalves <[email protected]>

Author: diogoncalves

.github/workflows/tests.yml

@@ -34,4 +34,5 @@ jobs:
           
       - name: Run unit tests
         run: |
+          source $(poetry env info --path)/bin/activate
           poetry run pytest libs/core