docs: fix local dev command (#147)

README.md

@@ -39,26 +39,26 @@ There are a couple of things that are different compared to the previous blog en
 To see your changes (and have hot-reload), run the following commands:
 
 ```console
-yarn prebuild
+yarn pre-build
 yarn start
 ```
 
-Note: `yarn prebuild` is only necessary the first time to get content under `/docs`.
+Note: `yarn pre-build` is only necessary the first time to get content under `/docs`.
 
 ## Local Development
 
 If you want to use the contents from [`electron/electron`](https://github.com/electron/electron)
 run the following:
 
 ```console
-yarn prebuild
+yarn pre-build
 yarn start
 ```
 
 If you want the website to pick your local documentation, run:
 
 ```console
-yarn prebuild ../relative/path/to/local/electron/repo
+yarn pre-build ../relative/path/to/local/electron/repo
 yarn start
 ```
 
@@ -74,7 +74,7 @@ For example, if you have the following structure:
 and assuming your prompt is in `/projects/electronjs.org-new/` you will have to run:
 
 ```console
-yarn prebuild ../electron
+yarn pre-build ../electron
 yarn start
 ```