Removed activesupport and actionpack upper limits.

Rails 8.1 is tested in the CI

Review

• Document code according to Getting Started with Yard.
• All tests are passing.
• Test manually.
• Get approval.

Pre-merge checklist

• The PR relates to a single subject with a clear title and description in grammatically correct, complete sentences.
• Verify that feature branch is up-to-date with master (if not - rebase it).
• Double check the quality of commit messages.
• Squash related commits together.