Merge pull request #487 from PierreCounathe/pierrecounathe/unit-5-propositions

Unit 5 Proposal Updates

units/en/unit5/quiz.mdx

@@ -78,13 +78,15 @@ The best way to learn and [to avoid the illusion of competence](https://www.cour
 
 ### Q3: Fill the missing letters
 
-- In Unity ML-Agents, the Policy of an Agent is called a b _ _ _ n
-- The component in charge of orchestrating the agents is called the _ c _ _ _ m _
+- In Unity ML-Agents, the Policy of an Agent is called a b \_ \_ \_ n
+- The component in charge of orchestrating the agents is called the \_ c \_ \_ \_ m \_
 
 <details>
 <summary>Solution</summary>
-- b r a i n
-- a c a d e m y
+<ul>
+	<li>b r a i n</li>
+	<li>a c a d e m y</li>
+</ul>
 </details>
 
 ### Q4: Define with your own words what is a `raycast`