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

Author: renovate[bot]

.github/workflows/update-deps.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/setup-go@v6
 
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Update minor and patch-level dependencies
         run: go get -t -u ./...