Bump actionview from 8.1.2 to 8.1.2.1 in /spec/dummy (#40)

Bumps [actionview](https://github.com/rails/rails) from 8.1.2 to 8.1.2.1.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v8.1.2.1/actionview/CHANGELOG.md)
- [Commits](https://github.com/rails/rails/compare/v8.1.2...v8.1.2.1)

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

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