Update gradle/actions action to v6 (#121)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build.yml

@@ -7,7 +7,7 @@ jobs:
       - name: "Checkout Repository"
         uses: actions/checkout@v6
       - name: "Validate Gradle Wrapper"
-        uses: gradle/actions/wrapper-validation@v5
+        uses: gradle/actions/wrapper-validation@v6
       - name: "Setup Java"
         uses: actions/setup-java@v5
         with: