Bump mcp gem version to 0.9.2 for security fix

Author: William Tsai

Gemfile.lock

@@ -44,7 +44,7 @@ GEM
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     logger (1.7.0)
-    mcp (0.9.1)
+    mcp (0.9.2)
       json-schema (>= 4.1)
     minitest (5.25.5)
     parallel (1.27.0)