Update actions/upload-artifact action to v6

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -29,7 +29,7 @@ jobs:
 
     - name: Upload reports
       if: failure()
-      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+      uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
       with:
         name: report
         path: ./**/build/reports