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

Author: renovate[bot]

.github/workflows/test.yaml

@@ -11,7 +11,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - uses: pnpm/action-setup@v4
     - name: Use Node.js 22
       uses: actions/setup-node@v4