change poetry install macos

.github/workflows/pytestmac.yml

@@ -20,8 +20,11 @@ jobs:
         python-version: 3.11.7
 
     - name: Install Poetry
-      run: |
-        curl -sSL https://install.python-poetry.org | python3 -
+      uses: snok/install-poetry@v1
+      with:
+        virtualenvs-create: true
+        virtualenvs-in-project: true
+        installer-parallel: true
 
     - name: Install dependencies
       run: |