Rails 7.0.0 

To be able to use annoate with rails 7, the dependency needs to be loosened up. It currently works with rails 7.0.0.rc1.

I have been using annotate with rails 7 alpha and now rc but I suspect that will break as rails 7 goes live because of `< 7.0` in gemspec on active record.


## Version

- annotate 3.1.1
- rails 7.0.0
- ruby 3.0.3
