chore(installation): remove homebrew cask installation as it errors out

[veritem]

Description

Remove homebrew cask installation

Requirements / Checklist

• [x] Read the Contributing Guidelines
• [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
• [ ] If this contains a font/glyph add its origin as background info below (e.g. URL)
• [x] Verified the license of any newly added font, glyph, or glyph set. License is: xxx

What does this Pull Request (PR) do?

Remove homebrew cask installation

How should this be manually tested?

Yes

Any background context you can provide?

Linked in screenshot provided

What are the relevant tickets (if any)?

Screenshots (if appropriate or helpful)

[Finii]

Thanks for the PR! :green_heart:

Related: #1637

I overlooked that.

[Finii]

@allcontributors please add @veritem for doc

[Finii]

Also corrected download page on http://nerdfonts.com (see commit above)