Update book to Bevy 0.12 (#803)

content/learn/book/getting-started/setup/_index.md

@@ -107,7 +107,7 @@ version = "0.1.0"
 edition = "2021" # this needs to be 2021, or you need to set "resolver=2"
 
 [dependencies]
-bevy = "0.11" # make sure this is the latest version
+bevy = "0.12" # make sure this is the latest version
 ```
 
 Make sure to use the latest `bevy` crate version ([![Crates.io](https://img.shields.io/crates/v/bevy.svg)](https://crates.io/crates/bevy)).
@@ -155,7 +155,7 @@ Bevy can be built just fine using default configuration on stable Rust. However
 
   ```toml
   [dependencies]
-  bevy = { version = "0.11.0", features = ["dynamic_linking"] }
+  bevy = { version = "0.12.0", features = ["dynamic_linking"] }
   ```
 
   NOTE: Remember to revert this before releasing your game! Otherwise you will need to include `libbevy_dylib` alongside your game if you want it to run. If you remove the "dynamic" feature, your game executable can run standalone.