Merge pull request #796 from JLESC/dependabot/bundler/rack-3.1.21

Bump rack from 3.1.14 to 3.1.21

Author: pancetta

Gemfile.lock

@@ -126,7 +126,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (7.0.5)
     racc (1.8.0)
-    rack (3.1.14)
+    rack (3.1.21)
     rake (13.2.1)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)