chore: update winget config file location & extension

[mdanish-kh]

Prerequisites

• I have read and understood the contributing guide.
• The commit message follows the conventional commits guidelines.
• Tests for the changes have been added (for bug fixes / features).
• Docs have been added/updated (for bug fixes / features).

Description

Update the WinGet configuration file location and extension in accordance with the latest file naming convention

[denelon]

Thanks @mdanish-kh I think @vedantmgoyal9 had attempted this before we had updated our guidance, so I wanted to let him know about this PR as well.

[denelon]

There are also documentation changes that should be made over at: https://ohmyposh.dev/docs/contributing/started

[denelon]

[mdanish-kh]

The docs have been updated as part of the PR

[JanDeDobbeleer]

@all-contributors please add @mdanish-kh for doc

This is pure magic 🪄! @holopin-bot @mdanish-kh wizard

[holopin-bot]

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[allcontributors]

@JanDeDobbeleer

I've put up a pull request to add @mdanish-kh! 🎉