[Documentation]: Typo in virtual desktops section

[robertn01]

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Issue Reported:
There is a typo in the following sentence -- please see the the word 'currenly':
"The service curren[t]ly has a mixture of hardware node types which host VMs of various flavours:"
Ref. URL: https://epcced.github.io/eidf-docs/services/virtualmachines/