Merge pull request #1811 from coderdojo-japan/security/update-rack-3.1.21

セキュリティ対応: rack を 3.1.20 から 3.2.6 へ更新

Author: yasulab

Gemfile.lock

@@ -288,7 +288,7 @@ GEM
       get_process_mem (>= 0.2)
       puma (>= 2.7)
     racc (1.8.1)
-    rack (3.1.20)
+    rack (3.2.6)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)
     rack-host-redirect (1.3.0)