Update rack to version 3.1.12

Author: depfu[bot]

Gemfile.lock

@@ -225,7 +225,7 @@ GEM
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.11)
+    rack (3.1.12)
     rack-proxy (0.7.7)
       rack
     rack-session (2.1.0)