Update gradle/actions action to v6 (#182)

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

Author: renovate[bot]

.github/workflows/build.yaml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: gradle/actions/wrapper-validation@v5
+      - uses: gradle/actions/wrapper-validation@v6
 
       - uses: actions/setup-java@v5
         with: