fix: Gemfile & Gemfile.lock to reduce vulnerabilities
fix: Gemfile & Gemfile.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-ACTIVESUPPORT-569598
SigmaITC/sigmaitc.github.io,SigmaITC/sigmaitc.github.io,SigmaITM/sigmaitm.github.io,SigmaITC/sigmaitc.github.io,SigmaITC/sigmaitc.github.io,SigmaITM/sigmaitm.github.io