Bump scout_apm from 5.4.0 to 5.5.0

Bumps [scout_apm](https://github.com/scoutapp/scout_apm_ruby) from 5.4.0 to 5.5.0.
- [Changelog](https://github.com/scoutapp/scout_apm_ruby/blob/master/CHANGELOG.markdown)
- [Commits](scoutapp/scout_apm_ruby@v5.4.0...v5.5.0)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -284,7 +284,7 @@ GEM
       rubocop-performance
       rubocop-rails
     ruby-progressbar (1.13.0)
-    scout_apm (5.4.0)
+    scout_apm (5.5.0)
       parser
     securerandom (0.4.0)
     shoulda-matchers (5.3.0)