Move to v3 of checkout action (#207)

* Move to v3 of checkout action

* Add name to first CI step

* Fix formatting typo

Author: AaronAtDuo

.github/workflows/python-ci.yml

@@ -16,7 +16,9 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout
+        uses: actions/checkout@v3
+      
       - name: Set up Python
         uses: actions/setup-python@v2
         with: