fix: Gemfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-RAILSHTMLSANITIZER-3168647
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-6274388
- https://snyk.io/vuln/SNYK-RUBY-LOOFAH-3168317
- https://snyk.io/vuln/SNYK-RUBY-LOOFAH-3168649
- https://snyk.io/vuln/SNYK-RUBY-RAILSHTMLSANITIZER-3168646
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-8220162
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-8220268
- https://snyk.io/vuln/SNYK-RUBY-ACTIVESUPPORT-3360028
- https://snyk.io/vuln/SNYK-RUBY-LOOFAH-3168318
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-7210237
- https://snyk.io/vuln/SNYK-RUBY-RAILSHTMLSANITIZER-3168316
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-3237231
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-3237232
- https://snyk.io/vuln/SNYK-RUBY-ACTIVESUPPORT-3237242
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-5741907
- https://snyk.io/vuln/SNYK-RUBY-ACTIVESUPPORT-5851458
- https://snyk.io/vuln/SNYK-RUBY-RAILTIES-5851410
- https://snyk.io/vuln/SNYK-RUBY-RAILSHTMLSANITIZER-3168648

Gemfile

@@ -70,7 +70,7 @@ gem 'pundit', '~> 2.2'
 gem 'premailer-rails'
 gem 'rack-attack', '~> 6.6'
 gem 'rack-cors', '~> 1.1', require: 'rack/cors'
-gem 'rails-i18n', '~> 6.0'
+gem 'rails-i18n', '~> 8.0', '>= 8.0.0'
 gem 'rails-settings-cached', '~> 0.6'
 gem 'redcarpet', '~> 3.5'
 gem 'redis', '~> 4.5', require: ['redis', 'redis/connection/hiredis']