chore(deps): update actions/checkout action to v6.0.3

Author: renovate[bot]

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6.0.1
+        uses: actions/checkout@v6.0.3
 
       - name: Set up Python
         uses: actions/setup-python@v6