Update dogstatsd-ruby requirement from <= 4.8.3 to <= 5.6.4

Updates the requirements on [dogstatsd-ruby](https://github.com/DataDog/dogstatsd-ruby) to permit the latest version.
- [Release notes](https://github.com/DataDog/dogstatsd-ruby/releases)
- [Changelog](https://github.com/DataDog/dogstatsd-ruby/blob/master/CHANGELOG.md)
- [Commits](DataDog/dogstatsd-ruby@v4.8.3...v5.6.3)

---
updated-dependencies:
- dependency-name: dogstatsd-ruby
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    network_resiliency (0.8.2)
+    network_resiliency (0.0.1)
 
 GEM
   remote: https://rubygems.org/
@@ -99,7 +99,7 @@ GEM
     debase-ruby_core_source (3.3.1)
     diff-lcs (1.5.1)
     docile (1.4.1)
-    dogstatsd-ruby (4.8.3)
+    dogstatsd-ruby (5.6.3)
     drb (2.2.1)
     erubi (1.13.0)
     faraday (1.10.3)
@@ -259,7 +259,7 @@ PLATFORMS
 DEPENDENCIES
   byebug
   ddtrace (>= 1)
-  dogstatsd-ruby (<= 4.8.3)
+  dogstatsd-ruby (<= 5.6.4)
   faraday (~> 1)
   faraday-rack
   mysql2 (>= 0.5)

network_resiliency.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency "byebug"
   s.add_development_dependency "ddtrace", ">= 1"
-  s.add_development_dependency "dogstatsd-ruby", "<= 4.8.3"
+  s.add_development_dependency "dogstatsd-ruby", "<= 5.6.4"
   s.add_development_dependency "faraday", "~> 1"
   s.add_development_dependency "faraday-rack"
   s.add_development_dependency "mysql2", ">= 0.5"