Bump rails from 8.1.2 to 8.1.2.1

Bumps [rails](https://github.com/rails/rails) from 8.1.2 to 8.1.2.1.
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](rails/rails@v8.1.2...v8.1.2.1)

---
updated-dependencies:
- dependency-name: rails
  dependency-version: 8.1.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile

@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
-gem "rails", "~> 8.1.1"
+gem "rails", "~> 8.1.2"
 # The modern asset pipeline for Rails [https://github.com/rails/propshaft]
 gem "propshaft"
 # Use postgresql as the database for Active Record