Modify badge description in README

Updated badge description for build and test status.

Author: codethinki

README.md

@@ -3,7 +3,7 @@
 
 
 ### State
-[![Build & Test](https://github.com/codethinki/flashmini/actions/workflows/build-test.yml/badge.svg)](https://github.com/codethinki/flashmini/actions/workflows/build-test.yml)
+[![Build & Test](https://github.com/codethinki/flashmini/actions/workflows/build-test.yml/badge.svg)](https://github.com/codethinki/flashmini/actions/workflows/build-test.yml)\
 Badge indicates:
 - Build with gcc (linux) and msvc (windows) with both cpu & cuda backend
 - Testing: gcc & msvc on cpu backend