New translations updating-b9s.md (Spanish)

docs/es_ES/updating-b9s.md

@@ -1,10 +1,10 @@
 # Updating B9S
 
-## Required Reading
+## Lectura requerida
 
 This page is for existing boot9strap users to update their installation of boot9strap to the latest version.
 
-## What You Need
+## Lo que necesitas
 
 - The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/download/v0.0.7/SafeB9SInstaller-20170605-122940.zip) (direct download)
 - The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/download/1.4/boot9strap-1.4.zip) (direct download)