Update push workflow to use poetry==1.8.5

Author: robotadam

.github/workflows/push.yml

@@ -12,7 +12,7 @@ jobs:
           python-version: "3.11"
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip poetry
+          python -m pip install --upgrade pip poetry==1.8.5
           poetry install
       - name: Lint
         run: |
@@ -31,7 +31,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip poetry
+          python -m pip install --upgrade pip poetry==1.8.5
           poetry install
       - name: Test
         run: poetry run pytest