documentation

.......... [ZBXNEXT-6524] updated API documentation

* commit '9bb05d7e0634d8d2289f8712cfba38d146478c63':
  .......... [ZBXNEXT-6524,ZBXNEXT-8462] added example for action.create
  .......... [ZBXNEXT-6524] added missing slash
  .......... [ZBXNEXT-6524] fixed duplicate issue due to merge
  .......... [ZBXNEXT-6524] fixed issues with comment hash and empty lines
  .D....... [ZBXNEXT-6524] fixed headings
  .D........ [ZBXNEXT-6524,ZBXNEXT-8532] updated API documentation