Bump kramdown from 1.17.0 to 2.3.0#18

dependabot[bot] wants to merge 1 commit intomasterhacktons/hacktons.github.io:masterfrom

dependabot/bundler/kramdown-2.3.0hacktons/hacktons.github.io:dependabot/bundler/kramdown-2.3.0Copy head branch name to clipboard