typo

.github/workflows/pubsub_python.yaml

@@ -28,7 +28,7 @@ jobs:
         run: |
           cd pubsub/python
           python -m pip install --upgrade pip
-          pip install -r  ./publisher/requirements.txt && pip install -r ./subscriber/requirements.txt
+          pip install -r ./publisher/requirements.txt && pip install -r ./subscriber/requirements.txt
 
       - name: build publisher image
         run: |