Bump json from 1.8.3 to 2.3.0 in /api/ruby/delivering-deployments

Bumps [json](https://github.com/flori/json) from 1.8.3 to 2.3.0.
- [Release notes](https://github.com/flori/json/releases)
- [Changelog](https://github.com/flori/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v1.8.3...v2.3.0)

---
updated-dependencies:
- dependency-name: json
  dependency-type: direct:production
...

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

Author: dependabot[bot]

api/ruby/delivering-deployments/Gemfile

@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-gem "json",        "~> 1.8"
+gem "json",        "~> 2.3"
 gem "octokit",     "~> 3.0"
 gem "shotgun"
 gem "sinatra",     "~> 2.2.3"

api/ruby/delivering-deployments/Gemfile.lock

@@ -4,7 +4,7 @@ GEM
     addressable (2.3.6)
     faraday (0.9.0)
       multipart-post (>= 1.2, < 3)
-    json (1.8.3)
+    json (2.3.0)
     multipart-post (2.0.0)
     mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
@@ -30,7 +30,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  json (~> 1.8)
+  json (~> 2.3)
   octokit (~> 3.0)
   shotgun
   sinatra (~> 2.2.3)