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

Author: renovate[bot]

.github/workflows/renovate-verify.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Homebrew
         id: set-up-homebrew