Update ubuntu.yml

Author: mmatera

.github/workflows/ubuntu.yml

@@ -21,6 +21,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        # Required for some kind of conflict with stopit...
+        python -m pip install --upgrade setuptools>=70.0.0
         python -m pip install pytest
         # Go over and comment out stuff when next Mathics core and Mathics-scanner are released
         # python -m pip install -e git+https://github.com/Mathics3/mathics-scanner#egg=Mathics-Scanner[full]