Add missing sudo & Curl pipe

[RMartinOscar]

• Update getting-started.mdx

• Update update.mdx

• Update install.mdx

Add missing sudo and make curl pipe to tar so we don't have a panel.tar.gz left over (Like we do in the Update section)

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Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 11, 2024 1:34am

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[RMartinOscar]

My GH is drunk