improve workflow

.github/workflows/python-CI.yml

@@ -51,12 +51,12 @@ jobs:
 
   phoenix-evals:
     name: Phoenix Evals
-    runs-on: ubuntu-latest
     needs: changes
     if: ${{ needs.changes.outputs.phoenix_evals == 'true' }}
     strategy:
       matrix:
         py: [ 3.9, 3.12 ]
+        os: [macos-12, windows-latest, ubuntu-latest]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
@@ -133,15 +133,15 @@ jobs:
     if: ${{ needs.changes.outputs.phoenix == 'true' }}
     strategy:
       matrix:
+        py: ["3.9"]
         os: [macos-12, windows-latest, ubuntu-latest]
-        python-version: ["3.9"]
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
-      - name: Set up python ${{ matrix.python-version }}
+      - name: Set up python ${{ matrix.py }}
         uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.py }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip==${{ env.pip-version }}
@@ -171,8 +171,8 @@ jobs:
     if: ${{ needs.changes.outputs.phoenix == 'true' }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-12]
         py: [ 3.9, 3.12 ]
+        os: [ubuntu-latest, windows-latest, macos-12]
     services:
       postgres:
         # Applying this workaround: https://github.com/actions/runner/issues/822