Update rails requirement from ~> 7.0.3 to ~> 7.2.1

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@v7.0.3...v7.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -5,7 +5,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby "~> 3.1.1"
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem "rails", "~> 7.0.3"
+gem "rails", "~> 7.2.1"
 # Use sqlite3 as the database for Active Record
 gem "sqlite3", "1.6.8"
 # Use Puma as the app server