Merge pull request #3300 from rails/dependabot/bundler/rack-2.2.6.2

Bump rack from 2.2.3.1 to 2.2.6.2

Author: amatsuda

Gemfile.lock

@@ -97,7 +97,7 @@ GEM
     parser (3.0.2.0)
       ast (~> 2.4.1)
     racc (1.6.0)
-    rack (2.2.3.1)
+    rack (2.2.6.2)
     rack-proxy (0.7.0)
       rack
     rack-test (1.1.0)