chore(deps): bump rack from 3.1.8 to 3.1.12 in /logto-sample (#37)

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Author: dependabot[bot]

logto-sample/Gemfile.lock

@@ -160,7 +160,7 @@ GEM
     puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.8)
+    rack (3.1.12)
     rack-session (2.0.0)
       rack (>= 3.0.0)
     rack-test (2.1.0)