Readme typo fix [ci skip]

Alexander Ryzhikov · Alexander Ryzhikov · commit fc89f30192c9 · 2016-10-23T12:45:18.000+03:00
diff --git a/README.md b/README.md
@@ -57,7 +57,7 @@ ES5 webpack config
 loaders: [
   {
     test: /\.config.css$/,
-    loader: 'postcss-variables-loaderes5=1'
+    loader: 'postcss-variables-loader?es5=1'
   }
 ]
 ```

Original file line number	Diff line number	Diff line change
`@@ -57,7 +57,7 @@ ES5 webpack config`
`57`	`57`	`loaders: [`
`58`	`58`	`{`
`59`	`59`	`test: /\.config.css$/,`
`60`		`- loader: 'postcss-variables-loaderes5=1'`
	`60`	`+ loader: 'postcss-variables-loader?es5=1'`
`61`	`61`	`}`
`62`	`62`	`]`
`63`	`63`	```