fix(build): windows platform build output path error

[btea]

Description

fix #17584
path.posix.relative and path.relative resolve differently when the path starts with lowercase.

import path from 'node:path'
path.posix.relative('c:/a', 'C:/a/index.html') // => '../../C:/a/index.html'
path.relative('c:/a',  'C:/a/index.html') // => 'index.html'