Use poetry-locked version of coverage

Author: tcompa

.github/workflows/ci_poetry.yml

@@ -124,12 +124,14 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - run: pipx install poetry==1.8.2
+      - run: poetry config virtualenvs.in-project true
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: 3.10
 
       - name: Install dependencies
-        run: python -m pip install --upgrade coverage[toml]
+        run: poetry install --only dev
 
       - name: Download data
         uses: actions/download-artifact@v4