Update actions/upload-artifact action to v6

Author: renovate[bot]

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
         run: |
           sed -i "s|0.0.0|"$(cat .version)"|g" pom.xml
           mvn -B package
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: artifacts
           path: |