fix: update coverage badge

tags: fix, doc

Why?

- Coverage badge URL has changed

Author: statnmap

README.Rmd

@@ -19,7 +19,7 @@ knitr::opts_chunk$set(
 [![fusen status badge](https://thinkr-open.r-universe.dev/badges/fusen)](https://thinkr-open.r-universe.dev)
 [![CRAN status](https://www.r-pkg.org/badges/version/fusen)](https://CRAN.R-project.org/package=fusen)
 [![R build status](https://github.com/ThinkR-open/fusen/workflows/R-CMD-check/badge.svg)](https://github.com/ThinkR-open/fusen/actions)
-[![codecov test coverage](https://app.codecov.io/gh/ThinkR-open/fusen/branch/main/graph/badge.svg?token=V0HOSAY8WW)](https://app.codecov.io/gh/ThinkR-open/fusen)
+[![codecov](https://codecov.io/gh/ThinkR-open/fusen/branch/main/graph/badge.svg?token=V0HOSAY8WW)](https://codecov.io/gh/ThinkR-open/fusen)
 [![](https://cranlogs.r-pkg.org/badges/fusen)](https://cran.r-project.org/package=fusen)
 <!-- badges: end -->
 

README.md

@@ -11,8 +11,7 @@ badge](https://thinkr-open.r-universe.dev/badges/fusen)](https://thinkr-open.r-u
 status](https://www.r-pkg.org/badges/version/fusen)](https://CRAN.R-project.org/package=fusen)
 [![R build
 status](https://github.com/ThinkR-open/fusen/workflows/R-CMD-check/badge.svg)](https://github.com/ThinkR-open/fusen/actions)
-[![codecov test
-coverage](https://app.codecov.io/gh/ThinkR-open/fusen/branch/main/graph/badge.svg?token=V0HOSAY8WW)](https://app.codecov.io/gh/ThinkR-open/fusen)
+[![codecov](https://codecov.io/gh/ThinkR-open/fusen/branch/main/graph/badge.svg?token=V0HOSAY8WW)](https://codecov.io/gh/ThinkR-open/fusen)
 [![](https://cranlogs.r-pkg.org/badges/fusen)](https://cran.r-project.org/package=fusen)
 <!-- badges: end -->