documentation

Pull request #1893: feature/ZBX-24761-7.2-D2. Updated instructions on updating repository configuration package for RHEL/derivatives and Debian/Ubuntu.

Merge in WEB/documentation from feature/ZBX-24761-7.2-D2 to release/7.2

* commit '7bf945f0722616e23af45381098d479e6bb3eb26':
  [ZBX-24761] added known issue entry
  [ZBX-24761] updated instructions on updating repository configuration package for RHEL/derivatives and Debian/Ubuntu