Updating 'sbcl' to 'sbcln' (#7095)

Changing 'sbcl' to 'sbcln' so it doesn't collide with 'Steel Bank Common Lisp', a popular lisp implementation.

plugins/sbt/sbt.plugin.zsh

@@ -10,7 +10,7 @@ alias sbc='sbt compile'
 alias sbcc='sbt clean compile'
 alias sbco='sbt console'
 alias sbcq='sbt console-quick'
-alias sbcl='sbt clean'
+alias sbcln='sbt clean'
 alias sbcp='sbt console-project'
 alias sbd='sbt doc'
 alias sbdc='sbt dist:clean'