Update .github/workflows/unit-test.yaml to install google extras too

Ideally the `pip install` command shouldn't be required as it's
installed already within the `integration-test-pytorch:gpu` image, but
if adding it, to ensure consistency we should also include the recently
included `google` extra that comes with `google-cloud-storage`;
otherwise the tests within
#76
will fail

Author: alvarobartt

.github/workflows/unit-test.yaml

@@ -44,5 +44,4 @@ jobs:
           -v ./tests:${{ env.CACHE_TEST_DIR }} \
           --entrypoint /bin/bash \
           integration-test-pytorch:gpu \
-          -c "pip install '.[test, st, diffusers]' && pytest ${{ env.CACHE_TEST_DIR }}/unit"
-        
+          -c "pip install '.[test,st,diffusers,google]' && pytest ${{ env.CACHE_TEST_DIR }}/unit"