Fix typo in Installation.md

[DarkAbhi]

Thank you for contributing to Homarr! So that your Pull Request can be handled effectively, please populate the following fields (delete sections that are not applicable)

Category

Documentation

Overview

Fixed a typo (Updae > Update)

Issue Number (if applicable)

Related issue: #00

New Vars (if applicable)

If you've added any new build scripts, environmental variables, config file options, dependency please outline here.

Screenshot (if applicable)

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Name	Status	Preview	Updated
homarr-docs	✅ Ready (Inspect)	Visit Preview	Dec 24, 2022 at 1:29PM (UTC)

[ajnart]

good catch :)