replace old repository references

README.md

@@ -4,7 +4,7 @@
 
 Greetings and welcome to `rustlings`. This project contains small exercises to get you used to reading and writing Rust code. This includes reading and responding to compiler messages!
 
-_...looking for the old, web-based version of Rustlings? Try [here](https://github.com/rustlings/rustlings/tree/rustlings-1)_
+_...looking for the old, web-based version of Rustlings? Try [here](https://github.com/rust-lang/rustlings/tree/rustlings-1)_
 
 Alternatively, for a first-time Rust learner, there's several other resources:
 
@@ -18,7 +18,7 @@ To use `rustlings` you need to have [Rust](https://www.rust-lang.org/) installed
 Once Rust is installed, clone the `rustlings` repository and enter the resulting directory:
 
 ```bash
-git clone https://github.com/rustlings/rustlings.git
+git clone https://github.com/rust-lang/rustlings.git
 cd rustlings
 ```
 

default_out.md

@@ -5,7 +5,7 @@ Thanks for installing `rustlings`!
 Let's make sure you're up to speed:
 - You have Rust installed, preferably via `rustup`
 - You have `~/.cargo/bin` added to your PATH variable
-- You have cloned this repository (https://github.com/rustlings/rustlings)
+- You have cloned this repository (https://github.com/rust-lang/rustlings)
 - You have installed Rust language support for your editor
 - You have locally installed the `rustlings` command by running:
 
@@ -17,4 +17,4 @@ If you've done all of this (or even most of it), congrats! You're ready
 to start working with Rust.
 
 To get started, run `rustlings verify` in order to get the first exercise.
-Make sure to have your editor open!
+Make sure to have your editor open!