feat: enable greedy Homebrew upgrades

zsh/.config/zsh/config/default.zsh

@@ -9,6 +9,8 @@ export SUDO_EDITOR="micro"
 
 export STARSHIP_CONFIG="$XDG_CONFIG_HOME"/starship/starship.toml
 
+export HOMEBREW_UPGRADE_GREEDY=1
+
 export PNPM_HOME="$HOME/.local/share/pnpm"
 case ":$PATH:" in
   *":$PNPM_HOME:"*) ;;