Install prerelase poetry in CI script

Reference: python-poetry/poetry#2711

.github/workflows/automated_checks.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install poetry
+        pip install poetry --pre
         poetry env use python${{ matrix.python-version }}
         poetry install
     - name: Format check with Black