chore: bump kmcp version to 0.2.2

[jmhbh]

Bumps kmcp to version 0.2.2

[Copilot]

Pull request overview

This PR bumps the kmcp dependency version to 0.2.2 across both the Helm chart configuration and the Go module dependencies, ensuring version consistency across the codebase.

• Updates kmcp image tag in Helm values from 0.1.9 to 0.2.2
• Updates Go module dependency from 0.1.8 to 0.2.2 with corresponding checksum updates
• Resolves a previous version mismatch between Helm and Go dependencies

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
helm/kagent/values.yaml	Updates kmcp container image tag from 0.1.9 to 0.2.2
go/go.mod	Updates kmcp Go module dependency from 0.1.8 to 0.2.2
go/go.sum	Updates checksums for kmcp v0.2.2 dependency

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.