Fixed action

Author: Pseudomanifold

.github/workflows/create_manifolds_release.yaml

@@ -15,9 +15,9 @@ jobs:
         with:
           python-version: '3.10.11'
           cache: 'pip'
-        # Currently the only dependency required for the conversion,
-        # thus saving us some time for running the action.
-        run: pip install numpy
+      # Currently the only dependency required for the conversion, thus
+      # saving us some time for running the action.
+      - run: pip install numpy
 
       - name: Run conversion script
         run: |