[improve][doc] change code style
@@ -14,7 +14,7 @@ To package a Java function, complete the following steps.
1. Create a new maven project with a pom file. In the following code sample, the value of `mainClass` is your package name.
- ```java
+ ```xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
