Bump bug report template versions to 5.0.1 in master

[etdsoft]

Summary

While investigating how to create a bug report for #27803 I realised the gem version numbers of the templates were slightly out of date.

Very similar to #27809 but on master since these are the files linked from http://guides.rubyonrails.org/contributing_to_ruby_on_rails.html#creating-a-bug-report

[rails-bot]

Thanks for the pull request, and welcome! The Rails team is excited to review your changes, and you should hear from @chancancode (or someone else) soon.

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[eileencodes]

Thanks!