refactor: streamline quiz schema formatting and improve readability

- Reformatted the quiz schema for consistent indentation and spacing, enhancing overall code clarity.
- Consolidated the random index calculation into a single line for improved readability.
- Maintained existing functionality while ensuring the code adheres to style guidelines for better maintainability.

src/Quiz/quiz.schema.ts

@@ -195,9 +195,7 @@ export class QuizSchema extends PothosSchema {
               },
             })
             // get amount of questions using nrOfQuestions and random index based on random
-            const randomIndex = quizzes.length > 0 
+            const randomIndex = quizzes.length > 0 ? Math.floor(random * quizzes.length) : 0
-              ? Math.floor(random * quizzes.length) 
-              : 0
             const nrOfQuestions = quizzes[0]?.nrOfQuestions ?? 1
             const result = quizzes.slice(randomIndex, randomIndex + nrOfQuestions)
             return result