changed admin password

Readme_configuration.md

-# Configuration
+e# Configuration
 
 NLPre is a language-agnostic, fully customizable benchmark. As language preprocessing tasks are generally
 similar in various languages, NLPre benchmark offers custom metric evaluation mechanism, based on 
@@ -65,7 +65,7 @@ the tasks that were added automatically to the database are those that are prese
 
 If you wish to manage the database objects from admin panel, you have to create a superuser account first.
 It can be done by running command `python manage.py createsuperuser` and following the instructions.
-Alternatively, you can log in with `admin:admin` credentials that are already provided.
+Alternatively, you can log in with `admin:nlpre123` credentials that are already provided.
 
 From admin panel it is possible to add or remove tasks, as well as modify submissions and their results.