!296 【轻量级 PR】：update zh-cn/device-dev/kernel/标准库-0.md.

Merge pull request !296 from pyroix/N/A

zh-cn/device-dev/kernel/标准库-0.md

@@ -68,7 +68,7 @@ static void *ChildThreadFunc(void *arg)
     /* 尝试获取mutex锁，正常场景，此处无法获取锁 */
     rc = pthread_mutex_trylock(&g_td.mutex);
     if (rc == 0) {
-        printf("ERROR: mutex gets an abnomal lock!\n");
+        printf("ERROR: mutex gets an abnormal lock!\n");
         goto EXIT;
     }