Bump @modelcontextprotocol/sdk from 1.25.3 to 1.26.0 in /example

Bumps [@modelcontextprotocol/sdk](https://github.com/modelcontextprotocol/typescript-sdk) from 1.25.3 to 1.26.0.
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](modelcontextprotocol/typescript-sdk@v1.25.3...v1.26.0)

---
updated-dependencies:
- dependency-name: "@modelcontextprotocol/sdk"
  dependency-version: 1.26.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

example/package.json

@@ -41,7 +41,7 @@
   },
   "dependencies": {
     "@aws-lambda-powertools/logger": "2.30.2",
-    "@modelcontextprotocol/sdk": "1.25.3",
+    "@modelcontextprotocol/sdk": "1.26.0",
     "aws-cdk-lib": "2.237.1",
     "aws-lambda-mcp-server": "workspace:*",
     "constructs": "10.4.5",