Update activesupport requirement from 8.0.1 to 8.1.0 (#36)

Updates the requirements on [activesupport](https://github.com/rails/rails) to permit the latest version.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v8.1.0/activesupport/CHANGELOG.md)
- [Commits](rails/rails@v8.0.1...v8.1.0)

---
updated-dependencies:
- dependency-name: activesupport
  dependency-version: 8.1.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'activesupport', '8.0.2.1'
+gem 'activesupport', '8.1.1'
 gem 'elasticsearch-xpack', '7.17.11'
 gem 'fluentd', '1.18.0'
 gem 'fluent-plugin-concat', '2.6.0'