Bump bugsnag from 6.27.1 to 6.28.0

Bumps [bugsnag](https://github.com/bugsnag/bugsnag-ruby) from 6.27.1 to 6.28.0.
- [Release notes](https://github.com/bugsnag/bugsnag-ruby/releases)
- [Changelog](https://github.com/bugsnag/bugsnag-ruby/blob/master/CHANGELOG.md)
- [Commits](bugsnag/bugsnag-ruby@v6.27.1...v6.28.0)

---
updated-dependencies:
- dependency-name: bugsnag
  dependency-version: 6.28.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -113,7 +113,7 @@ GEM
     bootstrap (4.6.2.1)
       autoprefixer-rails (>= 9.1.0)
       popper_js (>= 1.16.1, < 2)
-    bugsnag (6.27.1)
+    bugsnag (6.28.0)
       concurrent-ruby (~> 1.0)
     builder (3.3.0)
     chartkick (5.2.0)