docs: update java sdk documents

Signed-off-by: peefy <[email protected]>

Author: Peefy

i18n/zh-CN/docusaurus-plugin-content-docs/current/reference/xlang-api/java-api.md

@@ -36,6 +36,7 @@ sidebar_position: 5
 
 ## 快速开始
 
+```java
 import com.kcl.api.API;
 import com.kcl.api.Spec.ExecProgram_Args;
 import com.kcl.api.Spec.ExecProgram_Result;

i18n/zh-CN/docusaurus-plugin-content-docs/version-0.8/reference/xlang-api/java-api.md

@@ -36,6 +36,7 @@ sidebar_position: 5
 
 ## 快速开始
 
+```java
 import com.kcl.api.API;
 import com.kcl.api.Spec.ExecProgram_Args;
 import com.kcl.api.Spec.ExecProgram_Result;