[renovate-bot] - Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     name: Install and build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set Node.js 18.x
         uses: actions/setup-node@v6