typo in README

[plavcik]

I propose this patch

diff --git a/README.md b/README.md

-_Navigate to [http://localhost:3080](http://localhost:3080) or [http://localhost:3080/admin](http://localhost/admin:3080) in your web browser (default admin login/password: admin / admin1111)_
+_Navigate to [http://localhost:3080](http://localhost:3080) or [http://localhost:3080/admin](http://localhost:3080/admin) in your web browser (default admin login/password: admin / admin1111)_