added clearer instructions with hints

Author: UmiKami

exercises/05.1-second-styles/README.es.md

@@ -6,3 +6,7 @@
 
 ![Alert in bootstrap](../../.learn/assets/05.1-1.png?raw=true)
 
+## 💡 Pista:
+
++ Solamente debes cambiar los colores de fondo, colores de texto, y el estilo de los bordes.
++ El Badge tiene un `border-radius` de `50%`

exercises/05.1-second-styles/README.md

@@ -10,3 +10,7 @@ tutorial: "https://www.youtube.com/watch?v=Vr5Kh47NSuM"
 
 ![Alert in bootstrap](../../.learn/assets/05.1-1.png?raw=true)
 
+## 💡 Hint:
+
++ You should only style the background colors, text colors, and borders.
++ The badge has a `border-radius` of `50%`