Notification: be more concrete in what file to skip
Notification: be more concrete in what file to skip

The old regexp skips even files unrelated to the Bugsnag Ruby project.
Namely, it was skipping stack traces for my bugsnag-demo project.
The new regexp ensures that it skips only Bugsnag Ruby files.

arthurnn/bugsnag-ruby,tfausak/bugsnag-ruby,dtaniwaki/bugsnag-ruby,bugsnag/bugsnag-ruby,Shopify/bugsnag-ruby,arthurnn/bugsnag-ruby,tfausak/bugsnag-ruby,adrianmacneil/bugsnag-ruby,bugsnag/bugsnag-ruby,mokhan/bugsnag-ruby,dtaniwaki/bugsnag-ruby,johnnyt/bugsnag-ruby,jgross206/bugsnag-ruby,adrianmacneil/bugsnag-ruby,Shopify/bugsnag-ruby,BlakeMesdag/bugsnag-ruby,jgross206/bugsnag-ruby,arthurnn/bugsnag-ruby,johnnyt/bugsnag-ruby,Shopify/bugsnag-ruby,mokhan/bugsnag-ruby,bugsnag/bugsnag-ruby,jgross206/bugsnag-ruby,tfausak/bugsnag-ruby,dtaniwaki/bugsnag-ruby,adrianmacneil/bugsnag-ruby,mokhan/bugsnag-ruby,johnnyt/bugsnag-ruby,bugsnag/bugsnag-ruby