docs: update instructions

Author: sijis

README.rst

@@ -1,14 +1,14 @@
 err-coderwall an err plugin to query coderwall
 ==============================================
 
-For more information about err you can find it here: https://github.com/gbin/err
+For more information about errbot you can find it here: https://github.com/errbotio/errbot
 
 **Installation**
 
 If you have the admin rights on an err chatbot simply use
 ::
 
-    !install err-coderwall
+    !repos install errbotio/err-coderwall
 
 in order to install the plugin.
 Then !help to see the available commands and their explanation.