minor #8837 [Encore] Typo fix: use correct parameter options (bobdenotter)

This PR was merged into the 3.3 branch.

Discussion
----------

[Encore] Typo fix: use correct parameter `options`

Commits
-------

d740e1c Typo fix: use correct parameter `options`

Author: xabbuh

frontend/encore/css-preprocessors.rst

@@ -32,7 +32,7 @@ can also pass options to ``sass-loader``:
 
     Encore
         // ...
-        .enableSassLoader(function(sassOptions) {
+        .enableSassLoader(function(options) {
             // https://github.com/sass/node-sass#options
             // options.includePaths = [...]
         });