Rails 6.0 incompatible: annotate_rendered_view_with_filenames

[D-system]

The method annotate_rendered_view_with_filenames is Rails 6.1+ only.

better-html/lib/better_html/railtie.rb

Line 11 in 8f77d96

BetterHtml.config.annotate_rendered_view_with_filenames = ActionView::Base.annotate_rendered_view_with_filenames

I found this issue while running the test for maintenance_tasks https://github.com/Shopify/maintenance_tasks/actions/runs/8289887525/job/22695983684?pr=991

rails aborted!
NoMethodError: undefined method `annotate_rendered_view_with_filenames' for ActionView::Base:Class
/home/runner/work/maintenance_tasks/maintenance_tasks/vendor/bundle/ruby/3.0.0/gems/better_html-2.1.0/lib/better_html/railtie.rb:11:in `block (2 levels) in <class:Railtie>'

[D-system]

I'm in the side of dropping activesupport 6.0 compatibility (which already is) and update the gemspec.