Update rack to version 3.2.6

Author: depfu[bot]

Gemfile.lock

@@ -282,7 +282,7 @@ GEM
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.2.4)
+    rack (3.2.6)
     rack-cache (1.17.0)
       rack (>= 0.4)
     rack-cors (3.0.0)