Update tasks/BigFive_task.txt

tasks/BigFive_task.txt

@@ -13,7 +13,7 @@ For Openness, a negative number means closedness to experience, while positive n
 The listing of the results for each speaker must look exacly like this format (ratings must be a rating number from -10 to 10, high number means high in trait, while negative number means the opposite trait or very low in this trait, and explanation must be very short - up to 100 words maximum:
 
 -------------------------------------------------------
-Speaker [number]
+Speaker: [number]
 Extraversion: [rating]
 Agreeableness: [rating]
 Conscientiousness: [rating]