cdnjs should always be lowercase

[MattIPv4]

Couldn't see any existing rule for enforcing correct capitalization of brand names (was surprised given Cloudflare vs. CloudFlare), so I've added one as part of this. Haven't written a Vale rule before so it could be wrong!

[GregBrimble]

Looks like a great addition to me! Again, will defer to @KianNH for final approval :)

[GregBrimble]

Not sure whitespace alone is enough. What about something like Welcome to Cloudflare., platforms like: GitHub, GitLab, etc. and links ([GitHub](https://github.com/))

[MattIPv4]

Hmm, I'm not sure there's going to be a good way to do that, while still avoiding what Kian flagged, unless we're going to allow some non-alphanumeric chars but not others (e.g. allow [],., but not -/)?

[GregBrimble]

I'd personally think that we'd want to warn on all uses, and try to exclude certain ones which we know are valid. The Microsoft Work/Google Docs spellcheck dictionary approach.

So I'd suggest (?<!https:\/\/[^\s]+)(?<!create-)(?!GitLab)(?:[gG]it\s?[lL]ab) and equivalents.

[GregBrimble]

Oh, Next.js is another one I see get mis-stylized all the time.