Bump bugsnag from 6.15.0 to 6.16.0
Bump bugsnag from 6.15.0 to 6.16.0

Bumps [bugsnag](https://github.com/bugsnag/bugsnag-ruby) from 6.15.0 to 6.16.0.
- [Release notes](https://github.com/bugsnag/bugsnag-ruby/releases)
- [Changelog](https://github.com/bugsnag/bugsnag-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bugsnag/bugsnag-ruby/compare/v6.15.0...v6.16.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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