fix(config): use github for cdnEntry

[nberlette]

Description

The current config.cdnEntry URL uses cdn.jsdelivr.net/gh to source iconify JSON data. I discovered that when using icons from a particularly large set, such as noto, there's apparently a 20MB size limit that was being exceeded. This was causing an annoying 403 error in my VSCode interface:

This PR replaces the JSDelivr URL with a direct link to raw.githubusercontent.com instead.

Linked Issues

Fixes issue #34.

Additional context

Following a couple rudimentary speed tests between this and unpkg.com, I concluded that using raw.githubusercontent.com for the CDN source was the best way to go.

Thank you! 🫶🏼

[antfu]

The reason we use jsdelivr is to make it accessible to users from China (github raw is not available). If that's the case, can we change the default to unpkg? Thanks