update doc

Author: alexcheng1982

.github/workflows/build.yaml

@@ -19,4 +19,4 @@ jobs:
           distribution: "temurin"
           cache: maven
       - name: Build with Maven
-        run: mvn --batch-mode --update-snapshots package
+        run: mvn -B -ntp package

README.md

@@ -33,6 +33,8 @@ Pgvector。参考 `docker-compose.yaml` 文件。
 
 通过用户界面进行交互，访问 http://localhost:8080/webjars/chat-agent-ui/index.html
 
+![用户界面](./spring-ai-naive-rag-ui.png)
+
 ## 课程
 
 [![课程](./course.png)](https://www.bilibili.com/cheese/play/ss15645)