Bump rollbar from 2.25.0 to 2.25.1

Bumps [rollbar](https://github.com/rollbar/rollbar-gem) from 2.25.0 to 2.25.1.
- [Release notes](https://github.com/rollbar/rollbar-gem/releases)
- [Changelog](https://github.com/rollbar/rollbar-gem/blob/master/CHANGELOG.md)
- [Commits](rollbar/rollbar-gem@v2.25.0...v2.25.1)

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

Gemfile.lock

@@ -69,7 +69,7 @@ GEM
     redis (4.2.1)
     regexp_parser (1.7.1)
     rexml (3.2.4)
-    rollbar (2.25.0)
+    rollbar (2.25.1)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)