Update rack to version 2.2.18 (#270)

Co-authored-by: depfu[bot] <23717796+depfu[bot]@users.noreply.github.com>

Author: depfu[bot]

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    media_types-serialization (2.1.0)
+    media_types-serialization (2.2.1)
       actionpack (>= 6.1.7.10)
       activesupport (>= 6.1.7.10)
       media_types (>= 2.2.3, < 3.0.0)
@@ -110,12 +110,14 @@ GEM
       racc (~> 1.4)
     nokogiri (1.18.9-x64-mingw-ucrt)
       racc (~> 1.4)
+    nokogiri (1.18.9-x86_64-linux-gnu)
+      racc (~> 1.4)
     oj (3.16.11)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
     ostruct (0.6.3)
     racc (1.8.1)
-    rack (2.2.17)
+    rack (2.2.18)
     rack-test (2.2.0)
       rack (>= 1.3)
     rails (6.1.7.10)