Fix #5046 compatible with MacOS (#5406)

Signed-off-by: Marc Khouzam <marc.khouzam@gmail.com>
(cherry picked from commit c94c00915f)

cmd/helm/completion.go

@@ -212,7 +212,7 @@ __helm_convert_bash_to_zsh() {
 	-e "s/${LWORD}compopt${RWORD}/__helm_compopt/g" \
 	-e "s/${LWORD}declare${RWORD}/__helm_declare/g" \
 	-e "s/\\\$(type${RWORD}/\$(__helm_type/g" \
-	-e 's/aliashash\["\(\w\+\)"\]/aliashash[\1]/g' \
+	-e 's/aliashash\["\(.\{1,\}\)"\]/aliashash[\1]/g' \
 	<<'BASH_COMPLETION_EOF'
 `
 	out.Write([]byte(zshInitialization))