ci: bump forgotten action

Author: dimaqq

.github/workflows/test.yaml

@@ -176,7 +176,7 @@ jobs:
           - "3.5/stable"
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Python
         uses: actions/setup-python@v5
         with: