Fix naming in ci job

7 jobs for master in 5 minutes and 38 seconds (queued for 1 second)
Status Job ID Name Coverage
  Syntax 21
passed #222
ruby
ruby_2.1

00:00:09

 
  Syntax 22
passed #223
ruby
ruby_2.2

00:00:09

 
  Syntax 23
passed #224
ruby
ruby_2.3

00:00:09

 
  Syntax 24
passed #225
ruby
ruby_2.4

00:00:09

 
  Syntax J17
passed #226
ruby
jruby_1.7

00:02:06

 
  Syntax J91
passed #227
ruby
jruby_9.1

00:02:41

 
  Linting
passed #228
ruby
rubocop

00:00:11