DEV: update syntax tree to latest (#24623)

update format to latest syntax tree

spec/lib/middleware/request_tracker_spec.rb

@@ -667,10 +667,10 @@ RSpec.describe Middleware::RequestTracker do
     end
 
     let(:logger) do
-      ->(env, data) {
+      ->(env, data) do
         @env = env
         @data = data
-      }
+      end
     end
 
     before { Middleware::RequestTracker.register_detailed_request_logger(logger) }