net-mgmt/nagvis: update 1.9.34 to 1.9.36

  https://github.com/NagVis/nagvis/blob/nagvis-1.9.36/ChangeLog

  * FIX: Fix various PHP 8.2 incompatibilities
  * FIX: MySQL 8.0 - Fix "Invalid JSON response"
  * FIX: PHP 8.1 Deprecated: Implicit conversion from float
  * FIX: Fix context menu not hiding in some situations
  * Fix PHP 5.4 incompatibility