fix(agent-toolkit): Update dependency @modelcontextprotocol/sdk to v1.26.0 [SECURITY] #26948

Job	Run time
Check Permissions	11s
Build Packages	1m 25s
Formatting \| Dedupe \| Changeset	1m 13s
Static analysis	1m 36s
Publish with pkg-pr-new	1m 6s
Unit Tests (**)	3m 25s
Integration Tests (localhost, chrome)	1m 47s
Integration Tests (ap-flows, chrome)	1m 44s
Integration Tests (express, chrome)	1m 56s
Integration Tests (sessions, chrome)	2m 6s
Integration Tests (generic, chrome)	6m 8s
Integration Tests (sessions:staging, chrome)	2m 22s
Integration Tests (astro, chrome)	3m 4s
Integration Tests (handshake, chrome)	1m 10s
Integration Tests (tanstack-react-start, chrome)	1m 31s
Integration Tests (fastify, chrome)	1m 14s
Integration Tests (hono, chrome)	1m 35s
Integration Tests (billing, chrome)	3m 56s
Integration Tests (handshake:staging, chrome)	1m 12s
Integration Tests (nuxt, chrome)	1m 52s
Integration Tests (chrome-extension, chrome)	1m 34s
Integration Tests (machine, chrome)	4m 38s
Integration Tests (nextjs, chrome, 15)	6m 6s
Integration Tests (vue, chrome)	1m 42s
Integration Tests (react-router, chrome)	1m 32s
Integration Tests (quickstart, chrome, 15)	2m 12s
Integration Tests (custom, chrome)	1m 43s
Integration Tests (nextjs, chrome, 16)	5m 43s
Integration Tests (cache-components, chrome, 16)	1m 31s
Integration Tests (quickstart, chrome, 16)	2m 3s
	1h 9m 17s

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