Upgrade to v4

Author: lauzadis

.github/workflows/continuous-integration.yml

@@ -68,7 +68,7 @@ jobs:
           ./gradlew test jvmTest
       - name: Save Test Reports
         if: failure()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: test-reports-${{ matrix.os }}
           path: '**/build/reports'