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](modelcontextprotocol/ruby-sdk@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>

Author: dependabot[bot]

Gemfile.lock

@@ -12,8 +12,8 @@ GEM
     addressable (2.8.9)
       public_suffix (>= 2.0.2, < 8.0)
     ast (2.4.3)
-    bigdecimal (4.0.1)
-    bigdecimal (4.0.1-java)
+    bigdecimal (4.1.0)
+    bigdecimal (4.1.0-java)
     connection_pool (3.0.2)
     crack (1.0.1)
       bigdecimal
@@ -45,7 +45,7 @@ GEM
       ffi-compiler (~> 1.0)
       rake (~> 13.0)
     maxmind-db (1.4.0)
-    mcp (0.8.0)
+    mcp (0.9.2)
       json-schema (>= 4.1)
     minitest (6.0.2)
       drb (~> 2.0)