fix small typo (#2271)

Author: sajadtorkamani

symfony/file-upload.md

@@ -2,7 +2,7 @@
 
 As common a problem as it may seem, handling file upload requires a custom implementation in your
 app. This page will guide you in handling file upload in your API, with the help
-of[VichUploaderBundle](https://github.com/dustin10/VichUploaderBundle). It is recommended you
+of [VichUploaderBundle](https://github.com/dustin10/VichUploaderBundle). It is recommended you
 [read the documentation of VichUploaderBundle](https://github.com/dustin10/VichUploaderBundle/blob/master/docs/index.md)
 before proceeding. It will help you get a grasp on how the bundle works, and why we use it.