fix(ci): actions/upload-artifact v3 -> v4 (#343)

Author: leebs0521

.github/workflows/CI.yml

@@ -91,7 +91,7 @@ jobs:
 
       - name: 테스트 레포트 저장
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: test-reports
           path: build/reports/tests/test