Merge #301

301: 2.1(QEMU): update app name for git project init r=eldruin a=rwaskiewicz

**What this PR seeks to solve:**
this isn't a huge problem, but only the "Using `git`" section of the book uses
the application name 'awesome-app', which doesn't align with the other
startup sections/commands that follow this section. the workaround is to use
'awesome-app' in lieu of 'app' in commands like `cargo size`.

**Changes:**
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

Co-authored-by: Ryan Waskiewicz <ryanwaskiewicz@gmail.com>

Author: bors[bot]

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
 ```