Update site/content/docs/5.3/customize/sass.md

Co-authored-by: Julien Déramond <[email protected]>

Author: mdo

site/content/docs/5.3/customize/sass.md

@@ -97,7 +97,7 @@ We like to use the CLI to compile our Sass, but you can use whichever method you
 # Install Sass globally
 npm install -g sass
 
-# Watches your custom Sass for changes and compiles it to CSS
+# Watch your custom Sass for changes and compile it to CSS
 sass --watch ./scss/custom.scss ./css/custom.css
 ```