drivers/note:Fix the crash issue when enabling trace dump

fix dereference of null pointer.

Signed-off-by: liwenxiang1 <liwenxiang1@xiaomi.com>

drivers/note/note_driver.c

@@ -2118,7 +2118,7 @@ void note_get_taskname(pid_t pid, FAR char *buf, size_t len)
 
       if (ti != NULL)
         {
-          strlcpy(buf, tcb->name, len);
+          strlcpy(buf, ti->name, len);
         }
       else
         {