(DOCS): Edit File Upload (RocketChat#1457)

* Edit File Upload

* Edit File Upload

* Edit File Upload

Author: paulofariadias

administrator-guides/file-upload/README.md

@@ -1,12 +1,12 @@
-# File Storages
+# File Upload
 
-There are several choices for file storage
+There are several choices for file storage:
 
 - GridFS
 - [Amazon S3](amazon-s3/)
 - [Google Cloud Storage](google-cloud-storage/)
 - [WebDAV](webdav/)
-- [Minio](minio/) - selfhosted S3 compatible object storage
-- Local file system
+- [Minio](minio/) - Self-hosted S3 compatible object storage
+- Local File System
 
-To change the system that you want to use from the default GridFS select the option from the "Storage Type" section.
+To change the system from the default GridFS, select the option you prefer from the `Storage Type` section.