Modify the docs api documentation description

issues:https://gitee.com/openharmony/docs/issues/I5O4JISigned-off-by: Nwangben <wangben15@huawei.com>

en/application-dev/reference/apis/js-apis-process.md

@@ -390,7 +390,7 @@ var pres = process.getEnvironmentVar("PATH")
 
 ## process.runCmd
 
-runCmd(command: string, options?: { timeout : number, killSignal : number | string, maxBuffer : number }): ChildProcess
+runCmd(command: string, options?: { timeout?: number, killSignal?: number | string, maxBuffer?: number }): ChildProcess
 
 Forks a new process to run a shell command and returns the **ChildProcess** object.
 

zh-cn/application-dev/reference/apis/js-apis-process.md

@@ -389,7 +389,7 @@ var pres = process.getEnvironmentVar("PATH")
 
 ## process.runCmd
 
-runCmd(command: string, options?: { timeout : number, killSignal : number | string, maxBuffer : number }): ChildProcess
+runCmd(command: string, options?: { timeout?: number, killSignal?: number | string, maxBuffer?: number }): ChildProcess
 
 通过runcmd可以fork一个新的进程来运行一段shell，并返回ChildProcess对象。