README.md: Update the installer URL for Linuxbrew
README.md: Update the installer URL for Linuxbrew

Linuxbrew/brew,maxim-belkin/brew,hanxue/linuxbrew,Linuxbrew/brew,maxim-belkin/brew,Linuxbrew/brew,rwhogg/brew,rwhogg/brew,maxim-belkin/brew,hanxue/linuxbrew,hanxue/linuxbrew,rwhogg/brew,Linuxbrew/brew