Please update the outdated information #736

For page https://git-scm.com/book/gr/v2/Git-Tools-Credential-Storage

If you’re using Windows, you can install a helper called “winstore.” This is similar to the “osxkeychain” helper described above, but uses the Windows Credential Store to control sensitive information. It can be found at https://gitcredentialstore.codeplex.com.

The project "Windows Credential Store" is no longer maintained and has been replaced by Microsoft/Git Credential Manager for Windows.