Bump rails from 6.1.4.6 to 6.1.5

Bumps [rails](https://github.com/rails/rails) from 6.1.4.6 to 6.1.5.
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](https://github.com/rails/rails/compare/v6.1.4.6...v6.1.5)

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

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

Gemfile

@@ -30,7 +30,7 @@ gem 'prometheus_exporter'
 gem 'pry-byebug'
 gem 'puma'
 gem 'pundit'
-gem 'rails', '~> 6.1.4'
+gem 'rails', '~> 6.1.5'
 gem 'rails_admin'
 gem 'rails-i18n'
 gem 'rails-timeago'