Use newer SDK version

Author: jspahrsummers

template/package.json.ejs

@@ -9,7 +9,7 @@
     "start": "node build/index.js"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^0.5.0"
+    "@modelcontextprotocol/sdk": "0.6.0"
   },
   "devDependencies": {
     "@types/node": "^20.11.24",