update docs

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

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

@@ -245,7 +245,7 @@ getThreadPriority(v:number): number
 - 示例：
   ```
   import process from '@ohos.process'
-  var tid = process。getTid();
+  var tid = process.getTid();
   var pres = process.getThreadPriority(tid);
   ```