Merge pull request #25 from Stephen-RA-King/dependabot/github_actions…

…/main/actions/checkout-4

build(deps): bump actions/checkout from 3 to 4

.github/workflows/tests.yml

@@ -23,7 +23,7 @@ jobs:
             python-version: "3.8"
     steps:
       # Step 3. Check-out repository so we can access its contents
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Step 2. Set up Python 3.9
       - uses: actions/setup-python@v4
         with: