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

Author: renovate[bot]

.github/workflows/build-test-ci.yml

@@ -13,7 +13,7 @@ jobs:
       matrix:
         node-version: [20.x]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: pnpm/action-setup@v3
         with:
           version: 8