get it right

Author: martinthomson

.github/workflows/python.yml

@@ -32,7 +32,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install black
-        cd python; pip install -r python/requirements.txt
+        cd python; pip install -r requirements.txt
     - name: Reformat
       run: |
         cd python; black --check .