Update dependency rails to v8

Author: renovate[bot]

Gemfile

@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 plugin 'bundler-inject'
 require File.join(Bundler::Plugin.index.load_paths("bundler-inject")[0], "bundler-inject") rescue nil
 
-gem 'rails', '~> 6.1.0', '>= 6.1.7.8'
+gem 'rails', '~> 8.0.0', '>= 8.0.0'
 
 # Use PostgreSQL as the database for Active Record
 gem 'pg'