fixed structure bugs

data/2.Java中阶/7.注解/2.使用apt处理注解/Apt.json → data/2.Java中阶/7.注解/2.使用apt处理注解/apt.json

 {
   "type": "code_options",
   "author": "zxm2015",
-  "source": "Apt.md",
+  "source": "apt.md",
   "notebook_enable": false,
   "exercise_id": "3abe982223824612bdf4a78ab47225b7"
 }
\ No newline at end of file