Bump rack from 2.2.3.1 to 3.0.7 in /examples

Bumps [rack](https://github.com/rack/rack) from 2.2.3.1 to 3.0.7.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.2.3.1...v3.0.7)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
...

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

examples/Gemfile.lock

@@ -2,32 +2,39 @@ PATH
   remote: ..
   specs:
     asana (0.10.5)
-      faraday (~> 1.0)
-      faraday_middleware (~> 1.0)
-      faraday_middleware-multi_json (~> 0.0)
-      oauth2 (~> 1.4)
+      faraday (~> 2.0)
+      faraday-follow_redirects
+      faraday-multipart
+      oauth2 (>= 1.4, < 3)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    faraday (1.0.1)
-      multipart-post (>= 1.2, < 3)
-    faraday_middleware (1.0.0)
-      faraday (~> 1.0)
-    faraday_middleware-multi_json (0.0.6)
-      faraday_middleware
-      multi_json
-    jwt (2.2.1)
-    multi_json (1.15.0)
+    faraday (2.7.4)
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-follow_redirects (0.3.0)
+      faraday (>= 1, < 3)
+    faraday-multipart (1.0.4)
+      multipart-post (~> 2)
+    faraday-net_http (3.0.2)
+    hashie (5.0.0)
+    jwt (2.7.0)
     multi_xml (0.6.0)
-    multipart-post (2.1.1)
-    oauth2 (1.4.4)
-      faraday (>= 0.8, < 2.0)
+    multipart-post (2.3.0)
+    oauth2 (2.0.9)
+      faraday (>= 0.17.3, < 3.0)
       jwt (>= 1.0, < 3.0)
-      multi_json (~> 1.3)
       multi_xml (~> 0.5)
-      rack (>= 1.2, < 3)
-    rack (2.2.3.1)
+      rack (>= 1.2, < 4)
+      snaky_hash (~> 2.0)
+      version_gem (~> 1.1)
+    rack (3.0.7)
+    ruby2_keywords (0.0.5)
+    snaky_hash (2.0.1)
+      hashie
+      version_gem (~> 1.1, >= 1.1.1)
+    version_gem (1.1.2)
 
 PLATFORMS
   ruby