Clustering docs using wrong URL for engines/schedules/managers

[dominictory]

https://github.com/OpenCTI-Platform/docs/blob/main/docs/deployment/clustering.md

https://docs.opencti.io/latest/deployment/clustering/?h=cluster#managers-and-schedulers has a link to configuration:

https://docs.opencti.io/latest/deployment/configuration/#schedules-engines

This should be:

https://docs.opencti.io/latest/deployment/configuration/#engines-schedules-and-managers