Update docs re: electron module update

docs/tutorial/electron-versioning.md

@@ -16,6 +16,6 @@ Version numbers are bumped using the following rules:
 * Patch: For new features and bug fixes - if you upgrade from `1.0.0` to
   `1.0.1`, your app will continue to work as-is.
 
-If you are using `electron-prebuilt`, we recommend that you set a fixed version
+If you are using `electron` or `electron-prebuilt`, we recommend that you set a fixed version
 number (`1.1.0` instead of `^1.1.0`) to ensure that all upgrades of Electron are
 a manual operation made by you, the developer.

docs/tutorial/quick-start.md

@@ -155,9 +155,9 @@ Once you've created your initial `main.js`, `index.html`, and `package.json` fil
 you'll probably want to try running your app locally to test it and make sure it's
 working as expected.
 
-### electron-prebuilt
+### `electron`
 
-[`electron-prebuilt`](https://github.com/electron-userland/electron-prebuilt) is
+[`electron`](https://github.com/electron-userland/electron-prebuilt) is
 an `npm` module that contains pre-compiled versions of Electron.
 
 If you've installed it globally with `npm`, then you will only need to run the