Build(deps): bump activesupport in /frameworks/Ruby/grape

Bumps [activesupport](https://github.com/rails/rails) from 8.1.1 to 8.1.2.1.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v8.1.2.1/activesupport/CHANGELOG.md)
- [Commits](https://github.com/rails/rails/compare/v8.1.1...v8.1.2.1)

---
updated-dependencies:
- dependency-name: activesupport
  dependency-version: 8.1.2.1
  dependency-type: indirect
...

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