readme: clarify an ambiguous shell example
readme: clarify an ambiguous shell example

Xaltotun/conan,memsharded/conan,conan-io/conan,mropert/conan,lasote/conan,dragly/conan,tivek/conan,memsharded/conan,mropert/conan,birsoyo/conan,conan-io/conan,luckielordie/conan,birsoyo/conan,memsharded/conan,dragly/conan,luckielordie/conan,tivek/conan,memsharded/conan,lasote/conan,Xaltotun/conan,conan-io/conan