【修改】细节错误改动

docs/README.md

@@ -14,4 +14,5 @@
 |[user-guide.md](user-guide.md)     |使用指南|
 |[api.md](api.md)                   |API 说明|
 |[samples.md](samples.md)           |示例说明|
+|[migration-guide.md](migration-guide.md)  |迁移指南|
 

src/webclient.c

@@ -545,7 +545,7 @@ int webclient_resp_status_get(struct webclient_session *session)
  *
  * @param session webclient session
  *
- * @return response status code
+ * @return response content length
  */
 int webclient_content_length_get(struct webclient_session *session)
 {