Bump sinatra from 2.2.0 to 2.2.3 in /ruby-mfa-example

Bumps [sinatra](https://github.com/sinatra/sinatra) from 2.2.0 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@v2.2.0...v2.2.3)

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

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

Author: dependabot[bot]

ruby-mfa-example/Gemfile

@@ -3,5 +3,5 @@
 source 'https://rubygems.org'
 
 gem 'dotenv', '2.7.6'
-gem 'sinatra', '2.2.0'
+gem 'sinatra', '2.2.3'
 gem 'workos', '2.12.0'

ruby-mfa-example/Gemfile.lock

@@ -2,16 +2,16 @@ GEM
   remote: https://rubygems.org/
   specs:
     dotenv (2.7.6)
-    mustermann (1.1.2)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.6.4)
-    rack-protection (2.2.0)
+    rack-protection (2.2.3)
       rack
     ruby2_keywords (0.0.5)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.2.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sorbet-runtime (0.5.10741)
     tilt (2.1.0)
@@ -23,7 +23,7 @@ PLATFORMS
 
 DEPENDENCIES
   dotenv (= 2.7.6)
-  sinatra (= 2.2.0)
+  sinatra (= 2.2.3)
   workos (= 2.12.0)
 
 BUNDLED WITH