Update '5_Envio_de_mails'

5_Envio_de_mails.md

@@ -10,7 +10,7 @@
 ### Libreria core.mail
 
 *settings.py* 
-```
+```py
 EMAIL_BACKEND = 'django.core.imail.backends.smtp.EmailBackend'
 EMAIL_HOST = 'smtp.gmail.com'
 EMAIL_USE_TLS = True
@@ -22,7 +22,7 @@ EMAIL_HOST_PASSWORD = 'clave-ejemplo'
 [django.core.mail-doc](https://docs.djangoproject.com/en/3.0/topics/email/#module-django.core.mail)
 
 🔸️***python3 manage.py shell***
-```
+```py
 (InteractiveConsole)
 >>> from django.core.mail import send_mail
 >>> 
@@ -36,7 +36,7 @@ EMAIL_HOST_PASSWORD = 'clave-ejemplo'
   
 ### Envio de mail desde formulario de contacto  
 *views.py*
-```
+```py
 ...
 from django.core.mail import send_mail
 from django.conf import settings