docs: ✏️ fix readme type badge link

README.md

@@ -1,6 +1,6 @@
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![js-semistandard-style](https://img.shields.io/badge/code%20style-semistandard-brightgreen.svg?style=flat-square)](https://github.com/standard/semistandard)
-[![Types](https://img.shields.io/npm/types/@polymeshassociation/polymesh-sdk)](https://)
+[![Types](https://img.shields.io/npm/types/@polymeshassociation/polymesh-sdk)](https://www.npmjs.com/package/@polymeshassociation/polymesh-sdk)
 [![npm](https://img.shields.io/npm/v/@polymeshassociation/polymesh-sdk)](https://www.npmjs.com/package/@polymeshassociation/polymesh-sdk)
 [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 [![Coverage](https://sonarcloud.io/api/project_badges/measure?project=PolymeshAssociation_polymesh-sdk&metric=coverage)](https://sonarcloud.io/summary/new_code?id=PolymeshAssociation_polymesh-sdk)