Merge pull request #56 from berkeley-cdss/dependabot/bundler/rack-3.1.21

Bump rack from 3.1.7 to 3.1.21

Author: pancakereport

Gemfile.lock

@@ -169,7 +169,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (6.0.1)
     racc (1.8.1)
-    rack (3.1.7)
+    rack (3.1.21)
     rack-test (2.1.0)
       rack (>= 1.3)
     rackup (2.1.0)