Bump rexml from 3.3.7 to 3.3.9 in /examples/ruby#2019

harsha509 merged 3 commits intotrunkSeleniumHQ/seleniumhq.github.io:trunkfrom

dependabot/bundler/examples/ruby/rexml-3.3.9SeleniumHQ/seleniumhq.github.io:dependabot/bundler/examples/ruby/rexml-3.3.9Copy head branch name to clipboard