2.1(QEMU): update app name for git project init

update application name in the `Using git` section from `awesome-app`
to `app` to follow along with the rest of the initialization instructions/subsequent
sections of the book. this change is meant to make it easier to follow
instructions that follow this section in the book that use the name of the application

Author: rwaskiewicz

src/start/qemu.md

@@ -58,13 +58,13 @@ And then fill in the placeholders in the `Cargo.toml` file
 [package]
 authors = ["{{authors}}"] # "{{authors}}" -> "John Smith"
 edition = "2018"
-name = "{{project-name}}" # "{{project-name}}" -> "awesome-app"
+name = "{{project-name}}" # "{{project-name}}" -> "app"
 version = "0.1.0"
 
 # ..
 
 [[bin]]
-name = "{{project-name}}" # "{{project-name}}" -> "awesome-app"
+name = "{{project-name}}" # "{{project-name}}" -> "app"
 test = false
 bench = false
 ```