Update authentication documenation in system guide

[MayaBerd]

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Merge checklist

• [ ] Added/updated tests
• [ ] Added/updated documentation in Lookbook (patterns, previews, etc)
• [ ] Tested major browsers (Chrome, Firefox, Edge, ...)

[MayaBerd]

@as-op I've renamed a folder in System Guide, could you please take a look at the links and re-directs?

[MayaBerd]

@oliverguenther thanks for changing the link to the docs in the application! It seems that 14.5 does not exist yet, so I've worked based on 14.4 for now.