Fix typo in Spanish translation

CONTRIBUTORS.md

@@ -34,6 +34,7 @@ Contributors:
 - [Janne Mäntyharju](https://github.com/JanneMantyharju)
 - [Jean-François Magnier](https://github.com/lefakir)
 - [Jesusaplsoft](https://github.com/jesusaplsoft)
+- [Jesús Marín](https://github.com/alu0100502114)
 - [Karol J](https://github.com/dzudek)
 - [Kiswa](https://github.com/kiswa)
 - [Kralo](https://github.com/kralo)

app/Locale/es_ES/translations.php

@@ -951,7 +951,7 @@ return array(
     'Go to the search/filter box' => 'Ir a caja de buscar/filtrar',
     'There is no activity yet.' => 'Aún no hay actividades.',
     'No tasks found.' => 'No se ha hallado tarea alguna.',
-    'Keyboard shortcut: "%s"' => 'Atajo de teclado',
+    'Keyboard shortcut: "%s"' => 'Atajo de teclado: %s',
     'List' => 'Lista',
     'Filter' => 'Filtro',
     'Advanced search' => 'Búsqueda avanzada',