Merge pull request #3 from douglaswth/dependabot/github_actions/actions/checkout-4

.github/workflows/au.yml

@@ -16,7 +16,7 @@ jobs:
       run:
         shell: powershell
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 100
       - name: Check a build environment