Update rails requirement from ~> 7.0.0 to ~> 7.1.2

Updates the requirements on [rails](https://github.com/rails/rails) to permit the latest version.
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](rails/rails@v7.0.0...v7.1.2)

---
updated-dependencies:
- dependency-name: rails
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'rails', '~> 7.0.0'
+gem 'rails', '~> 7.1.2'
 gem 'rspec'
 gem 'rspec-rails', '~> 6.0'
 gem 'sqlite3'