build(deps-dev): bump mcp from 0.7.1 to 0.8.0

Bumps [mcp](https://github.com/modelcontextprotocol/ruby-sdk) from 0.7.1 to 0.8.0.
- [Release notes](https://github.com/modelcontextprotocol/ruby-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/ruby-sdk/blob/main/CHANGELOG.md)
- [Commits](modelcontextprotocol/ruby-sdk@v0.7.1...v0.8.0)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 0.8.0
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -301,7 +301,7 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     machinist (1.0.6)
-    mcp (0.7.1)
+    mcp (0.8.0)
       json-schema (>= 4.1)
     membrane (1.1.0)
     method_source (1.1.0)