Merge pull request #271 from mosfet80/patch-3

Update `actions/checkout` to v3 in self-tests

Author: webknjaz

.github/workflows/self-smoke-test-action.yml

@@ -42,7 +42,7 @@ jobs:
 
     steps:
     - name: Check out the action locally
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         path: test
     - name: Install the packaging-related tools