Fix wrong URL for Rails benchmarks driver.
Fix wrong URL for Rails benchmarks driver.

segiddins/ruby-bench-suite,ruby-bench/ruby-bench-suite,ruby-bench/ruby-bench-suite,segiddins/ruby-bench-suite,ruby-bench/ruby-bench-suite,tgxworld/ruby-bench-suite,tiegz/ruby-bench-suite,tgxworld/ruby-bench-suite,tiegz/ruby-bench-suite