fix: Gemfile to reduce vulnerabilities
fix: Gemfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-SHRINE-1015813
bitzesty/trade-tariff-admin,bitzesty/trade-tariff-admin,bitzesty/trade-tariff-admin,bitzesty/trade-tariff-admin