Fix small typo in symfony/webpack-encore-bundle (#1100)

Co-authored-by: Arnaud Lier <[email protected]>

Author: ArnaudLier

symfony/webpack-encore-bundle/1.10/webpack.config.js

@@ -11,7 +11,7 @@ Encore
     .setOutputPath('public/build/')
     // public path used by the web server to access the output path
     .setPublicPath('/build')
-    // only needed for CDN's or sub-directory deploy
+    // only needed for CDN's or subdirectory deploy
     //.setManifestKeyPrefix('build/')
 
     /*