fix: Gemfile.lock to reduce vulnerabilities (#5)
fix: Gemfile.lock to reduce vulnerabilities (#5)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-KRAMDOWN-585939
hanfi/hanfi.github.io,hanfi/hanfi.github.io,hanfi/hanfi.github.io,hanfi/hanfi.github.io