Incorrect example in main manual

[NikNik77771]

In paragraph from a Ceylon module containing a Verticle module.ceylon should be:

module httpserververticle "1.0.0" {
  shared import "io.vertx.ceylon.core" "1.0.0";
  shared import "io.vertx.ceylon.platform" "1.0.0";
}

instead of

module httpserververticle "1.0.0" { 
  shared import "io.vertx.ceylon" "1.0.0"; 
}