chore(deps): update actions/upload-artifact action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Build
         run: ./gradlew build
       - name: Upload Build Artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: Build Output
           path: "out/*.jar"