improved instructions and provided additional documentation on object-fit

Author: UmiKami

exercises/08-Rounded-Image/README.es.md

@@ -16,6 +16,8 @@ El problema con este enfoque es que solo funciona para imágenes cuadradas... La
 
 ## 💡 Pista:
 
-+ Si la imagen es más grande que el `div` y quieres centrarla o enfocarte en una zona en particular puedes utilizar `object-position`.
++ Si la imagen es más grande que su contenedor y quieres centrarla o enfocarte en una zona en particular puedes utilizar `object-position`.
 
 + En este articulo puedes leer más [sobre la propiedad object fit](https://css-tricks.com/on-object-fit-and-object-position/)
+
++ Adicionalmente, puedes [leer la documentación de object-position](https://developer.mozilla.org/en-US/docs/Web/CSS/object-position) y [la documentación de object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit)

exercises/08-Rounded-Image/README.md

@@ -15,7 +15,8 @@ The obvious way create a rounded profile picture is to create an image tag and a
 
 ## 💡 Hint:
 
-+ If the image ends up being bigger than the `div` (or with different proportions) you can adjust the `object-position` to choose what part of the image you want to display inside of the circle.
++ If the image ends up being bigger than its container (or with different proportions) you can adjust the `object-position` to choose what part of the image you want to display inside of the circle.
 
 + You can also read [this great article about object fit](https://css-tricks.com/on-object-fit-and-object-position/)
 
++ Additionally you can [read the documentation on object-position](https://developer.mozilla.org/en-US/docs/Web/CSS/object-position) and [the documentation on object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit)