brew: fix get-installer error on fresh macos

https://github.com/bevry/dorothy/actions/runs/6045403337/job/16405406987

commands/brew

@@ -20,7 +20,8 @@ function brew() (
 	# get the homebrew binary
 	local bin="${HOMEBREW_PREFIX-}/bin/brew"
 	if test ! -x "$bin"; then
-		echo-style --error='Homebrew is not installed.' ' ' --notice="Install it with:" ' ' --code="$(get-installer -- brew)" >/dev/stderr
+		echo-style --error='Homebrew is not installed.' ' ' --notice="Install it with:" ' ' --code='setup-mac-brew' >/dev/stderr
+		# ^ don't use get-installer, as bash v5 may not exist yet
 		return 74 # EPROGUNAVAIL 74 RPC prog. not avail
 	fi
 
@@ -32,7 +33,7 @@ function brew() (
 			Dorothy extends the [brew] command to:
 			- enforce the correct prefix via [HOMEBREW_PREFIX = $HOMEBREW_PREFIX]
 			- enforce the appropriate architecture via [HOMEBREW_ARCH = $HOMEBREW_ARCH]
-			- disable auto updates, as Dorothy handles that better via [$(get-installer -- brew)]
+			- disable auto updates, as Dorothy handles that better via [setup-mac-brew]
 			- disable brew environment hints, as Dorothy handles that better via [setup-environment-commands]
 		EOF
 		return 22 # EINVAL 22 Invalid argument