fix typo README.md (#68)

"comand" -> "command"

Author: osrm

README.md

@@ -101,7 +101,7 @@ make check-codestyle
 
 > Note: `check-codestyle` uses `isort`, `black` and `darglint` library
 
-Update all dev libraries to the latest version using one comand
+Update all dev libraries to the latest version using one command
 
 ```bash
 make update-dev-deps