Fix Kroki formats spec

We merged two changes almost simultaneously: one added this spec to
check the supported Kroki formats, and one bumped the gem to fix a typo
in a format name (wavedrow -> wavedrom). This broke the new tests.

spec/lib/gitlab/kroki_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe Gitlab::Kroki do
 
   describe '.formats' do
     def default_formats
-      %w[bytefield c4plantuml ditaa erd graphviz nomnoml plantuml svgbob umlet vega vegalite wavedrow].freeze
+      %w[bytefield c4plantuml ditaa erd graphviz nomnoml plantuml svgbob umlet vega vegalite wavedrom].freeze
     end
 
     subject { described_class.formats(Gitlab::CurrentSettings) }