chore(): updated examples

examples/apidoc/RestClientV2/spotSubTransfer.js

@@ -1,5 +1,8 @@
 const { RestClientV2 } = require('bitget-api');
 
+
+  // This example shows how to call this Bitget API endpoint with either node.js, javascript (js) or typescript (ts) with the npm module "bitget-api" for Bitget exchange
+  // This Bitget API SDK is available on npm via "npm install bitget-api"
   // ENDPOINT: /api/v2/spot/wallet/subaccount-transfer
   // METHOD: POST
   // PUBLIC: NO