documentation

Pull request #2327: Feature/ZBX-24644 7.0 D

Merge in WEB/documentation from feature/ZBX-24644-7.0-D to release/7.0

* commit '1efbde4c58d40433523f49901a3ba5fba582d5d0':
  ZBX-24644 added a note.
  ZBX-24644 added information of renaming a block, and short info of how to access it.
  ZBX-24644 changed the block name.