Delete content/en/altinity-kb-setup-and-maintenance/cluster-productio…

[TheraniAA]

…n-configuration-guide/version-upgrades.md

Deleting duplicates , as its already here https://kb.altinity.com/upgrade/

I have read the CLA Document and I hereby sign the CLA

[filimonov]

Please add alias for the old url (in case if somebody will try to access the old url - to be redirected to a new one instead of 404).

See
https://gohugo.io/methods/page/aliases/
See https://gohugo.io/content-management/urls/#aliases

Also those changes are not exactly the same - please combine them to collect all good practiices in one place.
(for example testing downgrade, using altinity stable).

[TheraniAA]

Hi @filimonov I have combined in PR raised before this one , https://github.com/Altinity/altinityknowledgebase/pull/81/files , Is this what you meant. Thanks

[filimonov]

Easier to do both changes in one branch, so it will be 1 PR. But ok.