Bump appsignal from 3.7.5 to 4.5.9

Bumps [appsignal](https://github.com/appsignal/appsignal-ruby) from 3.7.5 to 4.5.9.
- [Changelog](https://github.com/appsignal/appsignal-ruby/blob/main/CHANGELOG.md)
- [Commits](appsignal/appsignal-ruby@v3.7.5...v4.5.9)

---
updated-dependencies:
- dependency-name: appsignal
  dependency-version: 4.5.9
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -68,8 +68,9 @@ GEM
       tzinfo (~> 2.0)
     addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
-    appsignal (3.7.5)
-      rack
+    appsignal (4.5.9)
+      logger
+      rack (>= 2.0.0)
     ast (2.4.2)
     base64 (0.2.0)
     bcrypt (3.1.20)
@@ -244,7 +245,7 @@ GEM
     puma (6.5.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (2.2.10)
+    rack (2.2.13)
     rack-cors (2.0.2)
       rack (>= 2.0.0)
     rack-test (2.2.0)