Update rack (sec vuln)

Author: kitallis

Gemfile.lock

@@ -217,7 +217,7 @@ GEM
     public_suffix (5.0.1)
     puma (6.4.2)
       nio4r (~> 2.0)
-    rack (2.2.6.4)
+    rack (2.2.9)
     rack-jwt (0.4.0)
       jwt (~> 2.0)
       rack (>= 1.6.0)