fix link to tests in README (#1338)

Author: mus65

README.md

@@ -18,7 +18,7 @@ to [right-click and "unblock"](https://support.microsoft.com/en-us/help/2021383/
 the CHM file after you download it.
 
 Currently (4/18/2020), the documentation is very sparse.  Fortunately, there are a large number of tests in
-[Renci.SshNet.Tests](https://github.com/sshnet/SSH.NET/tree/develop/src/Renci.SshNet.Tests) that demonstrate
+[Renci.SshNet.Tests](https://github.com/sshnet/SSH.NET/tree/develop/test/Renci.SshNet.Tests) that demonstrate
 usage with working code.
 
 If the test for the functionality you would like to see documented is not complete, then you are cordially