Upgrade Go to 1.24.11 to fix GO-2025-4155 vulnerability (#815)

Prepared by Claude Code, reviewd by me.

## Summary
- Upgrade Go from 1.24.9 to 1.24.11 in the main `go.mod` to fix
govulncheck CI failure
- Upgrade Go from 1.24.7 to 1.24.11 in `deploy/go.mod` for the same
vulnerability fix

## Details

This PR addresses the failing `govulncheck` check in CI caused by
vulnerability **GO-2025-4155**:

- **Vulnerability**: Excessive resource consumption when printing error
string for host certificate validation in `crypto/x509`
- **Found in**: `crypto/x509@go1.24.9` (and earlier versions like
go1.24.7)
- **Fixed in**: `crypto/x509@go1.24.11`
- **More info**: https://pkg.go.dev/vuln/GO-2025-4155

Both Go module files in the repository are updated to 1.24.11 to ensure
consistent vulnerability remediation.

## Test plan
- [x] CI passes govulncheck after the Go version upgrade

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude <noreply@anthropic.com>

deploy/go.mod

@@ -1,6 +1,6 @@
 module github.com/modelcontextprotocol/registry/deploy/infra
 
-go 1.24.7
+go 1.24.11
 
 require (
 	github.com/pulumi/pulumi-gcp/sdk/v8 v8.41.1