build: bump sinatra from 1.4.7 to 2.2.3 in /spec/dummy/sinatra

Bumps [sinatra](https://github.com/sinatra/sinatra) from 1.4.7 to 2.2.3.
- [Changelog](https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md)
- [Commits](sinatra/sinatra@v1.4.7...v2.2.3)

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

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

spec/dummy/sinatra/Gemfile.lock

@@ -1,19 +1,29 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    rack (1.6.4)
-    rack-protection (1.5.3)
+    coderay (1.1.3)
+    method_source (1.1.0)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    rack (2.2.9)
+    rack-protection (2.2.3)
       rack
-    sinatra (1.4.7)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    tilt (2.0.5)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
+    tilt (2.4.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  pry
   sinatra
 
 BUNDLED WITH