Point to new Brew formula for PowerShell

[o-l-a-v]

Summary of the new feature / enhancement

Point people to using the new formula instead of this broken tap?

• powershell 7.5.4 (new formula) Homebrew/homebrew-core#268901
  • Thanks @GunniBusch. 🤩
• https://formulae.brew.sh/formula/powershell#default

brew install powershell

Proposed technical implementation details (optional)

No response

[sdwheeler]

The docs have been updated. https://learn.microsoft.com/powershell/scripting/install/alternate-install-methods