Bump sinatra from 1.3.6 to 2.2.3 in /api/ruby/delivering-deployments

Bumps [sinatra](https://github.com/sinatra/sinatra) from 1.3.6 to 2.2.3.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Changelog](https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md)
- [Commits](sinatra/sinatra@1.3.6...v2.2.3)

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

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

Author: dependabot[bot]

api/ruby/delivering-deployments/Gemfile

@@ -3,4 +3,4 @@ source "https://rubygems.org"
 gem "json",        "~> 1.8"
 gem "octokit",     "~> 3.0"
 gem "shotgun"
-gem "sinatra",     "~> 1.3.5"
+gem "sinatra",     "~> 2.2.3"

api/ruby/delivering-deployments/Gemfile.lock

@@ -6,21 +6,25 @@ GEM
       multipart-post (>= 1.2, < 3)
     json (1.8.3)
     multipart-post (2.0.0)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     octokit (3.0.0)
       sawyer (~> 0.5.3)
-    rack (1.6.13)
-    rack-protection (1.5.2)
+    rack (2.2.6.2)
+    rack-protection (2.2.3)
       rack
+    ruby2_keywords (0.0.5)
     sawyer (0.5.4)
       addressable (~> 2.3.5)
       faraday (~> 0.8, < 0.10)
     shotgun (0.9)
       rack (>= 1.0)
-    sinatra (1.3.6)
-      rack (~> 1.4)
-      rack-protection (~> 1.3)
-      tilt (~> 1.3, >= 1.3.3)
-    tilt (1.4.1)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
+    tilt (2.1.0)
 
 PLATFORMS
   ruby
@@ -29,7 +33,7 @@ DEPENDENCIES
   json (~> 1.8)
   octokit (~> 3.0)
   shotgun
-  sinatra (~> 1.3.5)
+  sinatra (~> 2.2.3)
 
 BUNDLED WITH
    1.11.2