Update CI.yml

.github/workflows/CI.yml

@@ -1,3 +1,6 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
 name: CI geeup
 
 on:
@@ -13,19 +16,13 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
         python-version: ["3.8", "3.9", "3.10"]
-jobs:
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [macos-latest, ubuntu-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10"]
-      steps:
+    steps:
       - name: Checkout repository
         continue-on-error: true
         uses: actions/checkout@v3
         with:
           fetch-depth: 0
+      - uses: actions/setup-python@v4
         with:
             python-version: ${{ matrix.python-version }}
       - name: Test packages