Update pytest.yml (#304)

Add ARM64 runner and bump checkout/setup-python versions

Author: weiliw-amz

.github/workflows/pytest.yml

@@ -10,14 +10,14 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12"]
-        platform: [ubuntu-20.04, ubuntu-22.04]
+        platform: [ubuntu-20.04, ubuntu-22.04, ubuntu-22.04-arm]
 
     runs-on: ${{ matrix.platform }}
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies