Unpin pipenv

.github/workflows/ci.yaml

@@ -95,7 +95,7 @@ jobs:
         run: |
           python -m pip install uv
           uv --no-config --no-managed-python --no-progress -v \
-            pip install --system --strict 'pipenv==2022.12.19'
+            pip install --system --strict pipenv
           PIPENV_VERBOSITY=64 pipenv install --system --skip-lock
       - name: Set up Django environment
         run: |