Update README.MD

Author: wei18

README.md

@@ -1,6 +1,6 @@
 # GitHub's REST API Swift Language Code
-
-[![Release](https://img.shields.io/github/v/release/wei18/github-rest-api-swift-openapi)](https://github.com/wei18/github-rest-api-swift-openapi/releases)
+[![](https://img.shields.io/badge/docc-read_documentation-blue)](https://swiftpackageindex.com/wei18/github-rest-api-swift-openapi/documentation)
+[![](https://img.shields.io/github/v/release/wei18/github-rest-api-swift-openapi)](https://github.com/wei18/github-rest-api-swift-openapi/releases)
 [![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fwei18%2Fgithub-rest-api-swift-openapi%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/wei18/github-rest-api-swift-openapi)
 [![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fwei18%2Fgithub-rest-api-swift-openapi%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/wei18/github-rest-api-swift-openapi)