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

Author: renovate[bot]

.github/workflows/workflow.yml

@@ -65,7 +65,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install shfmt
         run: brew install shfmt