[Fix #2249] Update the default value for cider-default-repl-command

The name of the defcustom is so bad that it confused even me. :D I'll
need to change this, as that's not really a default command, but a
default tool, which is something pretty different (depending on your
point of view, of course).

Author: bbatsov

cider.el

@@ -210,8 +210,7 @@ version from the CIDER package or library.")
   :safe #'stringp
   :package-version '(cider . "0.10.0"))
 
-(defcustom cider-default-repl-command
-  cider-clojure-cli-command
+(defcustom cider-default-repl-command "clojure-cli"
   "The default command and parameters to use when connecting to nREPL.
 This value will only be consulted when no identifying file types, i.e.
 project.clj for leiningen or build.boot for boot, could be found.