docs(guides): Update installation npm script name (#2749)

Ben Limmer · montogeek · commit 6018815aecee · 2019-01-04T18:35:31.000+01:00
In the follow-up steps in the guide, it always references `npm run build`, not `npm run start`. It seems like maybe in the initial installation section `build` should be the name of the npm task vs. `start`.
diff --git a/src/content/guides/installation.md b/src/content/guides/installation.md
@@ -40,7 +40,7 @@ Installing locally is what we recommend for most projects. This makes it easier
 
 ```json
 "scripts": {
-	"start": "webpack --config webpack.config.js"
+	"build": "webpack --config webpack.config.js"
 }
 ```
 

Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@ Installing locally is what we recommend for most projects. This makes it easier`
`40`	`40`
`41`	`41`	```json
`42`	`42`	`"scripts": {`
`43`		`- "start": "webpack --config webpack.config.js"`
	`43`	`+ "build": "webpack --config webpack.config.js"`
`44`	`44`	`}`
`45`	`45`	```
`46`	`46`