ci: install setuptools

Author: wrn14897

.github/workflows/unit.yaml

@@ -38,6 +38,11 @@ jobs:
           path: .venv
           key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}
       #----------------------------------------------
+      # install setuptools
+      #----------------------------------------------
+      - name: Install setuptools
+        run: pip install --upgrade setuptools
+      #----------------------------------------------
       # install dependencies if cache does not exist
       #----------------------------------------------
       - name: Install dependencies