updated README.md file to update codcov badge for new version

README.md

@@ -1,7 +1,7 @@
 [![Windows x64](https://github.com/bezzad/Downloader/workflows/Windows%20x64/badge.svg)](https://github.com/bezzad/Downloader/actions/workflows/dotnet-windows.yml)
 [![Ubuntu x64](https://github.com/bezzad/Downloader/workflows/Ubuntu%20x64/badge.svg)](https://github.com/bezzad/Downloader/actions/workflows/dotnet-ubuntu.yml)
 [![Build Status](https://ci.appveyor.com/api/projects/status/github/bezzad/downloader?branch=master&svg=true)](https://ci.appveyor.com/project/bezzad/downloader)
-[![codecov](https://codecov.io/gh/bezzad/downloader/branch/master/graph/badge.svg)](https://codecov.io/gh/bezzad/downloader)
+[![codecov](https://codecov.io/github/bezzad/Downloader/graph/badge.svg?token=CnLljCB3zO)](https://codecov.io/github/bezzad/Downloader)
 [![NuGet](https://img.shields.io/nuget/dt/downloader.svg)](https://www.nuget.org/packages/downloader)
 [![NuGet](https://img.shields.io/nuget/vpre/downloader.svg)](https://www.nuget.org/packages/downloader)
 [![CodeFactor](https://www.codefactor.io/repository/github/bezzad/downloader/badge/master)](https://www.codefactor.io/repository/github/bezzad/downloader/overview/master)