add missing asterisks

Author: Kent55

docs/sales-billing/student.md

@@ -10,7 +10,7 @@ sidebar_label: Student Discount
 20% student discount is guaranteed to accounts created using a student e-mail address. TryHackMe supports all student e-mail addresses and automatically recognizes domains like **.edu** and **.ac.uk**.
 
 ## My Student Email isn't recognised?
-In case if your student email was not automatically recognized and the website is displaying *$10 / £7.70* as the payment amount, please send an email to support@tryhackme.com** using your student e-mail. Make sure to provide your THM username so that the discount can be applied!
+In case if your student email was not automatically recognized and the website is displaying *$10 / £7.70* as the payment amount, please send an email to **support@tryhackme.com** using your student e-mail. Make sure to provide your THM username so that the discount can be applied!
 
 ##
 This way we ensure that everyone gets their discount and can enjoy subscription for 20% off!