Update README.md

Co-authored-by: Robert Laszczak <roblaszczak@gmail.com>

README.md

@@ -4,7 +4,7 @@ This is the `tdl` CLI tool used for running the interactive trainings on the [Th
 
 ## Install
 
-### Script (macOS, Linux)
+### Script (macOS, Linux) - recommended
 
 ```sh
 sudo /bin/sh -c "$(curl -fsSL https://raw.githubusercontent.com/ThreeDotsLabs/cli/master/install.sh)" -- -b /usr/local/bin```