fix (documentation): minor correcton on backend verification section

Author: harish-janardhanan

PROJECT-SETUP-GUIDE.md

@@ -99,7 +99,7 @@ java -jar target/*.jar
 ```
 
 #### Verify Backend is Running
-- **Application URL**: http://localhost:8080
+- **Application URL (swagger)**: http://localhost:8080/swagger-ui/index.html
 - **Health Check**: http://localhost:8080/actuator/health
 - **H2 Database Console**: http://localhost:8080/h2-console
   - **JDBC URL**: `jdbc:h2:file:./data/tradingdb`