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

Author: renovate[bot]

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
         runs-on: "${{ matrix.os }}"
         steps:
             -   name: "checkout repository"
-                uses: "actions/checkout@v4"
+                uses: "actions/checkout@v6"
             -   name: "setup jdk ${{ matrix.java }}"
                 uses: "actions/setup-java@v4"
                 with: