chore(deps): bump rmcp from 1.7.0 to 1.8.0

Bumps [rmcp](https://github.com/modelcontextprotocol/rust-sdk) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/modelcontextprotocol/rust-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/rust-sdk/blob/main/release-plz.toml)
- [Commits](modelcontextprotocol/rust-sdk@rmcp-v1.7.0...rmcp-v1.8.0)

---
updated-dependencies:
- dependency-name: rmcp
  dependency-version: 1.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]