Fix wrong default layout in README.md (mmistakes#348)

README.md

@@ -143,7 +143,7 @@ image       | If you want to add a personalized image to your blog post that wil
 share-img   | If you want to specify an image to use when sharing the page on Facebook or Twitter, then provide the image's full URL here.
 social-share | If you don't want to show buttons to share a blog post on social media, use `social-share: false` (this feature is turned on by default).
 use-site-title | If you want to use the site title rather than page title as HTML document title (ie. browser tab title), use `use-site-title: true`. When set, the document title will take the format `Site Title - Site Description` (eg. `My website - A virtual proof that name is awesome!`). By default, it will use `Page Title` if it exists, or `Site Title` otherwise.
-layout      | What type of page this is (default is `blog` for blog posts and `page` for other pages. You can use `minimal` if you don't want a header and footer)
+layout      | What type of page this is (default is `post` for blog posts and `page` for other pages. You can use `minimal` if you don't want a header and footer)
 js          | List of local JavaScript files to include in the page (eg. `/js/mypage.js`)
 ext-js      | List of external JavaScript files to include in the page (eg. `//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js`). External JavaScript files that support [Subresource Integrity (SRI)](https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity) can be specified using the `href` and `sri` parameters eg.<br/>`href: "//code.jquery.com/jquery-3.1.1.min.js"`<br/>`sri: "sha256-hVVnYaiADRTO2PzUGmuLJr8BLUSjGIZsDYGmIJLv2b8="`
 css         | List of local CSS files to include in the page