User documentation refers to version tags

[robcalon]

The sections add, update and remove a user in https://docs.energytransitionmodel.com/api/users reference the incorrect endpoint and parameters. Also the description of some of these sections refers to version tags. In the examples roler should probably also be role?

[mabijkerk]

@robcalon I addressed the typo. @louispt1 perhaps you could check the other issues when time allows?