docs: 리드미 추가

Author: solbijae

README.md

@@ -5,4 +5,4 @@
 ### 초기 성능
 - PageSpeed Insights 보고서 링크:
 - 보고서 전체 스크린샷
-  ![Image](https://github.com/user-attachments/assets/0de5dcfc-ff64-45b7-8a74-e2131d4f10fe)
+  ![Image](https://github.com/user-attachments/assets/4b06011c-45f1-48b3-8795-24588f3ce94e)