Fix typos in Spanish Language (#247)

* Fix typos in spanish translation

* Add viticlick to contributors

CONTRIBUTORS.md

@@ -51,3 +51,4 @@
 - [John Schroeder](https://blog.schroedernet.software)
 - [Tobias Lindberg](https://tobiaslindberg.com)
 - [KK](https://github.com/bebound)
+- [Víctor López](https://github.com/viticlick)

i18n/es.toml

@@ -8,17 +8,17 @@ other = "tag"
 other = "serie"
 
 [reading_time]
-one = "Un minuto de leer"
-other = "{{ .Count }} minutos de leer"
+one = "Un minuto de lectura"
+other = "{{ .Count }} minutos de lectura."
 
 [page_not_found]
-other = "Pagina no existe"
+other = "Página no existe."
 
 [page_does_not_exist]
 other = "Disculpa, aquí no hay nada."
 
 [head_back]
-other = "Puedes regresar a la <a href=\"{{ . }}\">primera pagina</a>."
+other = "Puedes regresar a la <a href=\"{{ . }}\">primera página</a>."
 
 [powered_by]
 other = "Promovido por"