documentation

.D........ [ZBXNEXT-2592] updated to latest from release/6.2; resolved conflicts in:
-en/manual/api/changes_6.0_-_6.2.md,
-en/manual/api/reference/host/get.md,
-en/manual/api/reference/hostgroup/get.md,
-en/manual/api/reference/hostgroup/massupdate.md,
-en/manual/api/reference/template/create.md,
-en/manual/api/reference/template/update.md.