Use new command to generate config

Old command doesn't exist anymore

layers/+lang/scala/README.org

@@ -63,7 +63,7 @@ newer that =0.13.5= of sbt.
 ** Usage
 
 1. Create a =.ensime= file at the root of your Scala project using =sbt
-   gen-ensime= at the shell.
+   ensimeConfig= and =sbt ensimeConfigProject= at the shell.
 2. Run =M-x ensime= within Emacs to start an ENSIME session.
 
 Each Scala project uses a dedicated ENSIME session, so you only need to run =M-x

layers/+lang/scala/packages.el

@@ -66,7 +66,7 @@
         "Regenerate `.ensime' file and restart the ensime server."
         (interactive)
         (progn
-          (sbt-command "gen-ensime")
+          (sbt-command ";ensimeConfig;ensimeConfigProject")
           (ensime-shutdown)
           (ensime)))