Outdated brew command

[UNovak]

Describe the bug

Not a bag just a small adjustment to README.md Update Using Homebrew section to be up to date:

 brew install --cask blurred       

Steps to reproduce

brew cask install blurred

Expected behaviour

Complete install

Screenshots

Environment

You may write here the specifications like the version of the project, operating system, or hardware if applicable.

Desktop (please complete the following information):

• OS: macOS
• Version 14.4.1 (23E224)