Use sqlite3 2.x for Rails 8 testing

Author: janko

gemfiles/Gemfile.rails-main

@@ -6,7 +6,7 @@ gem "rake", "~> 12.0"
 gem "warning"
 
 gem "rails", github: "rails/rails"
-gem "sqlite3", "~> 1.4",                platforms: :mri
+gem "sqlite3", "~> 2.0",                platforms: :mri
 gem "activerecord-jdbcsqlite3-adapter", platforms: :jruby
 
 gem "capybara"