Do not install extra in coverage GHA step

Author: tcompa

.github/workflows/ci_poetry.yml

@@ -131,7 +131,7 @@ jobs:
           python-version: "3.10"
 
       - name: Install dependencies
-        run: poetry install --with dev -E fractal-tasks
+        run: poetry install --with dev
 
       - name: Download data
         uses: actions/download-artifact@v4