build(deps): bump scout_apm from 5.5.0 to 5.6.0

Bumps [scout_apm](https://github.com/scoutapp/scout_apm_ruby) from 5.5.0 to 5.6.0.
- [Changelog](https://github.com/scoutapp/scout_apm_ruby/blob/master/CHANGELOG.markdown)
- [Commits](scoutapp/scout_apm_ruby@v5.5.0...v5.6.0)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -521,7 +521,7 @@ GEM
     sanitize (6.1.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    scout_apm (5.5.0)
+    scout_apm (5.6.0)
       parser
     securerandom (0.4.1)
     selenium-webdriver (4.27.0)