Bump sentry-ruby from 5.15.0 to 5.15.2

Bumps [sentry-ruby](https://github.com/getsentry/sentry-ruby) from 5.15.0 to 5.15.2.
- [Release notes](https://github.com/getsentry/sentry-ruby/releases)
- [Changelog](https://github.com/getsentry/sentry-ruby/blob/master/CHANGELOG.md)
- [Commits](getsentry/sentry-ruby@5.15.0...5.15.2)

---
updated-dependencies:
- dependency-name: sentry-ruby
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -286,7 +286,7 @@ GEM
     sentry-rails (5.15.0)
       railties (>= 5.0)
       sentry-ruby (~> 5.15.0)
-    sentry-ruby (5.15.0)
+    sentry-ruby (5.15.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
     sprockets (4.2.1)
       concurrent-ruby (~> 1.0)