Fix typos in documentation

https://www.zabbix.com/documentation/current/en/manual/api/reference/drule/create
discrovery -> discovery

https://www.zabbix.com/documentation/current/en/manual/api/reference/hostgroup/get
goup prototype -> group prototype

https://www.zabbix.com/documentation/current/en/manual/api/reference/templategroup/update
templtegroup.update -> templategroup.update

https://www.zabbix.com/documentation/current/en/manual/config/items/plugins
avaiability -> availability

https://www.zabbix.com/documentation/current/en/manual/api/reference/map/get
Local nerwork -> Local network

https://www.zabbix.com/documentation/current/en/manual/api/reference/correlation/delete
correlaionids - >correlationids

https://www.zabbix.com/distributed_monitoring
zabix_proxy -> zabbix_proxy

https://www.zabbix.com/documentation/current/en/manual/config/items/preprocessing/jsonpath_functionality
Checmical cleaning -> Chemical cleaning

https://www.zabbix.com/documentation/current/en/manual/api/reference/maintenance/delete
maintenanaces -> maintenance

https://www.zabbix.com/documentation/current/en/manual/config/users_and_usergroups/usergroup
gorups -> groups