Update actions/setup-java action to v6

Author: renovate[bot]

.github/workflows/actions.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           fetch-depth: 0
           fetch-tags: true
-      - uses: actions/setup-java@v5
+      - uses: actions/setup-java@v6
         with:
           distribution: temurin
           java-version: 26