Bump mcp from 0.8.0 to 0.9.2

Bumps [mcp](https://github.com/modelcontextprotocol/ruby-sdk) from 0.8.0 to 0.9.2.
- [Release notes](https://github.com/modelcontextprotocol/ruby-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/ruby-sdk/blob/main/CHANGELOG.md)
- [Commits](https://github.com/modelcontextprotocol/ruby-sdk/compare/v0.8.0...v0.9.2)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 0.9.2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -18,7 +18,7 @@ GEM
       public_suffix (>= 2.0.2, < 8.0)
     ast (2.4.3)
     base64 (0.3.0)
-    bigdecimal (4.0.1)
+    bigdecimal (4.1.0)
     concurrent-ruby (1.3.6)
     connection_pool (3.0.2)
     drb (2.2.3)
@@ -31,7 +31,7 @@ GEM
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     logger (1.7.0)
-    mcp (0.8.0)
+    mcp (0.9.2)
       json-schema (>= 4.1)
     minitest (6.0.2)
       drb (~> 2.0)