build(deps): bump appsignal from 4.2.0 to 4.2.1

Bumps [appsignal](https://github.com/appsignal/appsignal-ruby) from 4.2.0 to 4.2.1.
- [Changelog](https://github.com/appsignal/appsignal-ruby/blob/main/CHANGELOG.md)
- [Commits](appsignal/appsignal-ruby@v4.2.0...v4.2.1)

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

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

Gemfile.lock

@@ -62,7 +62,7 @@ GEM
       zeitwerk (~> 2.3)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
-    appsignal (4.2.0)
+    appsignal (4.2.1)
       logger
       rack
     ast (2.4.2)
@@ -182,7 +182,7 @@ GEM
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    logger (1.6.1)
+    logger (1.6.2)
     loofah (2.23.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)