docs(authelia): fix authelia link

[Aiz0]

Pull request

Purpose
The current authelia template links to https://authelia.com/docs/ which leads to a 404 page.
I've updated the url to link to the home page instead.

Approach
remove /docs/ from the url

Open Questions and Pre-Merge TODOs
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• Use github checklists. When solved, check the box and explain the answer.

Learning
If you add a new template for a application take a look at DockSTARTer for examples being I used them as base for the others templates

Requirements
Check all boxes as they are completed

• These changes meet the standards for contributing.
• I have read the code of conduct.