docs: remove incorrect parameter documentation of sassOptions funct…

…ion (#1227)

README.md

@@ -362,7 +362,7 @@ module.exports = {
           {
             loader: "sass-loader",
             options: {
-              sassOptions: (content, loaderContext) => {
+              sassOptions: (loaderContext) => {
                 // More information about available properties https://webpack.js.org/api/loaders/
                 const { resourcePath, rootContext } = loaderContext;
                 const relativePath = path.relative(rootContext, resourcePath);