Removed the "-" sign on Bun option for create-next-app CLI tool in th…

…e documentation (#64972)

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### What?
this is just small changes for this doc
[https://nextjs.org/docs/app/api-reference/create-next-app#interactive](https://nextjs.org/docs/app/api-reference/create-next-app#interactive)
### Why?
because `bunx create-next-app` is incorrect command for bun, if you run
that command it will given error like this
```terminal
$ bunx create-next-app
error: Script not found "create-next-app"
```
### How?
i just removed the "-" sign on bun option, so its must be like this 
```terminal
bunx create next-app
```

Co-authored-by: Sam Ko <sam@vercel.com>

docs/02-app/02-api-reference/06-create-next-app.mdx

@@ -26,7 +26,7 @@ pnpm create next-app
 ```
 
 ```bash filename="Terminal"
-bunx create-next-app
+bunx create next-app
 ```
 
 You will then be asked the following prompts: