Change enum IconVariable and Awscli installation via APT - Update getting-started.md

[StackNeverFlow]

Change enum IconVariable and Awscli installation via APT - Update getting-started.md

Description

This pull requets updates the docs/getting-started.md file, in which the documentation for "deployment" lifes in.

Changes

• Updated the link for ICON weather variables from enum IconVariable to IconVariables in the getting-started.md file.
• Added installation command for the awscli, via sudo apt-get install awscli

Context

The current link was leading to the wrong/ old file, causing confusion for users trying to access the list of ICON weather variables. This change ensures that the link accurately directs users to the correct location.
The Aws S3 Bucket Sync only works, if the awscli is installed.

[patrick-zippenfenig]

Thanks for the update and fixing the broken link. Can you point the link to

open-meteo/Sources/App/Icon/IconVariable.swift

Line 90 in 82a7357

enum IconSurfaceVariable: String, CaseIterable, GenericVariableMixable {

? This is a bit easier to understand

[patrick-zippenfenig]

Thanks!