Update README.md

examples/BigModel/Ernie/README.md

-Ernie 3.0 百亿参数模型部署案例
+# Ernie 3.0 百亿参数模型部署案例
 
 - [1.任务介绍](#1)
 - [2.运行环境说明](#2)
@@ -438,4 +438,4 @@ serving_build/core/general-server/serving
 导出到环境变量中：
 ```
 export SERVING_BIN=${PWD}/core/general-server/serving 
-```
\ No newline at end of file
+```