docs: Update README (#548)

doc-site/docs/getting-started/overview.md

@@ -10,14 +10,12 @@ You can find some package documentation below:
 
 | Package | Description | Version |
 | --- | --- | --- |
-| [@bnb-chain/greenfield-js-sdk](./packages/js-sdk/README.md) | A client library for Greenfield Chain | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Fgreenfield-js-sdk?color=blue)](https://www.npmjs.com/package/@bnb-chain/greenfield-js-sdk) |
-| [@bnb-chain/reed-solomon](./packages/reed-solomon/README.md) | calculate file's `checksums` | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Freed-solomon?color=blue)](https://www.npmjs.com/package/@bnb-chain/reed-solomon) |
-| [@bnb-chain/create-gnfd-app](./packages/create-gnfd-app/README.md) | Create Greenfield App Quickly | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Fcreate-gnfd-app?color=blue)](https://www.npmjs.com/package/@bnb-chain/create-gnfd-app) |
-| [@bnb-chain/bsc-cross-greenfield-sdk](./packages/bsc-cross-sdk/README.md) | Execute tx in BSC | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Fbsc-cross-greenfield-sdk?color=blue)](https://www.npmjs.com/package/@bnb-chain/bsc-cross-greenfield-sdk) |
+| [@bnb-chain/greenfield-js-sdk](https://github.com/bnb-chain/greenfield-js-sdk/tree/main/packages/js-sdk/README.md) | A client library for Greenfield Chain | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Fgreenfield-js-sdk?color=blue)](https://www.npmjs.com/package/@bnb-chain/greenfield-js-sdk) |
+| [@bnb-chain/reed-solomon](https://github.com/bnb-chain/greenfield-js-sdk/tree/main/packages/reed-solomon/README.md) | calculate file's `checksums` | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Freed-solomon?color=blue)](https://www.npmjs.com/package/@bnb-chain/reed-solomon) |
+| [@bnb-chain/create-gnfd-app](https://github.com/bnb-chain/greenfield-js-sdk/tree/main/packages/create-gnfd-app/README.md) | Create Greenfield App Quickly | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Fcreate-gnfd-app?color=blue)](https://www.npmjs.com/package/@bnb-chain/create-gnfd-app) |
+| [@bnb-chain/bsc-cross-greenfield-sdk](https://github.com/bnb-chain/greenfield-js-sdk/tree/main/packages/bsc-cross-sdk/README.md) | Execute tx in BSC | [![npm](https://img.shields.io/npm/v/%40bnb-chain%2Fbsc-cross-greenfield-sdk?color=blue)](https://www.npmjs.com/package/@bnb-chain/bsc-cross-greenfield-sdk) |
 
-## Playground
-
-* [Browser](https://codesandbox.io/p/github/rrr523/greenfield-nextjs-template/main?import=true)
+<!-- * [Browser](https://codesandbox.io/p/github/rrr523/greenfield-nextjs-template/main?import=true) -->
 <!-- TODO: after upgrade SDK version -->
 <!-- * [Nodejs](https://codesandbox.io/p/devbox/nodejs-greenfield-js-sdk-demo-wd5zft) -->