Bump rack from 3.0.11 to 3.1.3

Bumps [rack](https://github.com/rack/rack) from 3.0.11 to 3.1.3.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/commits/v3.1.3)

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

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

Gemfile

@@ -18,7 +18,7 @@ gem "songkick-transport", "~> 1.11.0"
 gem "bigdecimal", "~> 3.1.8"
 
 gem "prometheus-client", "~> 4.2.2"
-gem "rack", "~> 3.0"
+gem "rack", "~> 3.1"
 gem "rackup", "~> 2.1.0"
 gem "webrick", "~> 1.8.1"
 

Gemfile.lock

@@ -95,7 +95,7 @@ GEM
     public_suffix (5.0.4)
     raabro (1.4.0)
     racc (1.8.0)
-    rack (3.0.11)
+    rack (3.1.3)
     rackup (2.1.0)
       rack (>= 3)
       webrick (~> 1.8)
@@ -179,7 +179,7 @@ DEPENDENCIES
   prius (~> 6.0)
   prometheus-client (~> 4.2.2)
   pry-byebug
-  rack (~> 3.0)
+  rack (~> 3.1)
   rackup (~> 2.1.0)
   rake
   rspec (~> 3.13.0)