Update a couple of links

Author: bbatsov

README.md

@@ -11,13 +11,13 @@ middleware originally designed to enhance
 
 If you're just a user trying to get started with CIDER, then you
 probably don't want to read this. You should follow the steps in
-[CIDER's manual](http://docs.cider.mx) instead.
+[CIDER's manual](https://docs.cider.mx) instead.
 
 If you're trying to use cider-nrepl for some other purpose, the
 sections below outline how to include it in a project.
 
 People who are new to nREPL might benefit from reading [its
-manual](https://nrepl.readthedocs.io).
+manual](https://nrepl.xyz).
 
 ## Design