Update acts-as-taggable-on gem version
What does this MR do and why?
Changes: https://github.com/mbleigh/acts-as-taggable-on/compare/v8.1.0...v9.0.0
Changelog: https://github.com/mbleigh/acts-as-taggable-on/blob/master/CHANGELOG.md
The main reason is that 9.0 supports Rails 7