fix: app/Gemfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-ACTIONMAILER-8220269
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-8220162
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-8220268
- https://snyk.io/vuln/SNYK-RUBY-ACTIONTEXT-8220270

app/Gemfile

@@ -11,7 +11,7 @@ gem 'bcrypt'
 gem 'bootsnap', require: false
 gem 'puma', '~> 3.12'
 gem 'rack-cors', require: 'rack/cors'
-gem 'rails', '~> 6.0.2.1'
+gem 'rails', '~> 7.0.0.0'
 gem 'sqlite3'
 gem 'validate_url'
 
@@ -23,7 +23,7 @@ gem 'search_object_graphql'
 group :development, :test do
   gem 'byebug', platforms: %i(mri mingw x64_mingw)
   gem 'factory_bot_rails'
-  gem 'graphiql-rails', '1.5.0'
+  gem 'graphiql-rails', '1.10.0'
   gem 'rubocop'
 end