Fix node.js v16 deprecation self-smoke-test-action.yml

actions/checkout@v3 use node.js versio 16. But version 16 is deprecated.
version 4 fixes the problem.

.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