Merge pull request #1074 from reactjs/dependabot/bundler/rack-2.2.3

Bump rack from 2.0.8 to 2.2.3

Author: BookOfGreg

Gemfile.lock

@@ -158,7 +158,7 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.10)
     public_suffix (4.0.2)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (6.0.2.1)