docs: rename preset-uno to preset-wind3

[Marukome0743]

Description

UnoCSS Wind3 preset document says

Note

@unocss/preset-wind and @unocss/preset-uno are deprecated and renamed to @unocss/preset-wind3. This preset inherits from @unocss/preset-mini.

In Configure UnoCSS docs, the old name and link remain.
This PR fixed them.

[netlify]

✅ Deploy Preview for slidev ready!

Name	Link
🔨 Latest commit	bec3026
🔍 Latest deploy log	https://app.netlify.com/sites/slidev/deploys/67c6f441afa1f30008788b60
😎 Deploy Preview	https://deploy-preview-2100--slidev.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[pkg-pr-new]

Open in Stackblitz

@slidev/client

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/client@2100

create-slidev

npm i https://pkg.pr.new/slidevjs/slidev/create-slidev@2100

@slidev/parser

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/parser@2100

create-slidev-theme

npm i https://pkg.pr.new/slidevjs/slidev/create-slidev-theme@2100

@slidev/cli

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/cli@2100

@slidev/types

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/types@2100

commit: bec3026