Bump appsignal from 4.2.0 to 4.3.1

Bumps [appsignal](https://github.com/appsignal/appsignal-ruby) from 4.2.0 to 4.3.1.
- [Changelog](https://github.com/appsignal/appsignal-ruby/blob/main/CHANGELOG.md)
- [Commits](appsignal/appsignal-ruby@v4.2.0...v4.3.1)

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

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

Gemfile.lock

@@ -107,7 +107,7 @@ GEM
       marcel (>= 1.0.3)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
-    appsignal (4.2.0)
+    appsignal (4.3.1)
       logger
       rack
     ast (2.4.2)