Bump nokogiri from 1.15.4 to 1.15.6#96

dependabot[bot] wants to merge 1 commit intosourceopal/opal.github.io:sourcefrom

dependabot/bundler/nokogiri-1.15.6opal/opal.github.io:dependabot/bundler/nokogiri-1.15.6Copy head branch name to clipboard