docs: typos (#696)

Co-authored-by: Alexander Akait <[email protected]>

README.md

@@ -117,7 +117,7 @@ See [examples](#remove-order-warnings) below for details.
 Type: `String|Function`
 Default: `document.head.appendChild(linkTag);`
 
-By default, the `extract-css-chunks-plugin` appends styles (`<link>` elements) to `document.head` of the current `window`.
+By default, the `mini-css-extract-plugin` appends styles (`<link>` elements) to `document.head` of the current `window`.
 
 However in some circumstances it might be necessary to have finer control over the append target or even delay `link` elements instertion.
 For example this is the case when you asynchronously load styles for an application that runs inside of an iframe.