[ES] Translation of 13.md and 13-1.md (Atcold#551)

* Spanish translations 13 and 13-1

* Updated 13.md

* Update _config.yml

Co-authored-by: Alfredo Canziani <[email protected]>

Author: JonathanVSV

docs/_config.yml

@@ -288,6 +288,8 @@ es:
     - path: es/week11/11.md
       sections:
         - path: es/week11/11-1.md
+    - path: es/week13/13.md
+        - path: es/week13/13-1.md
 
 ################################### Italian ####################################
 it: