Move brew check to appropriate spot in update
Move brew check to appropriate spot in update

Fixes two problems:
1. Updating on a non-brew system exited with failure status
2. The output of brew bundle check would come after the reload reminder

benknoble/Dotfiles,benknoble/Dotfiles,benknoble/Dotfiles,benknoble/Dotfiles,benknoble/Dotfiles