Bump rails from 8.1.3 to 8.1.3.1 in the rails group

Bump rails from 8.1.3 to 8.1.3.1 in the rails group

Bumps the rails group with 1 update: [rails](https://github.com/rails/rails).

Updates `rails` from 8.1.3 to 8.1.3.1
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](https://github.com/rails/rails/compare/v8.1.3...v8.1.3.1)

---
updated-dependencies:
- dependency-name: rails
  dependency-version: 8.1.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: rails
...

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