Update lesson01.mdx

Update prefix information.

training-front-end/src/content/training_purchase/lesson01.mdx

@@ -109,10 +109,12 @@ The distinction between CBAs and IBAs is important when determining state tax ex
 Typically, purchase cards have this design:
 
 <Image class='margin-y-2' src='red-card.png' alt="Red charge card with the word Purchase and numbers 1234 5678 9012 3456 and the name John Smith, with a bird in the background" width="160" />
-
 _Please note that card designs may vary._
 
 ### GSA SmartPay Purchase Account Prefixes
+
+GSA SmartPay Purchase cards/accounts use the following prefixes:
+
 | Brand      | Card Prefix      |
 | ---------- | ---------------- |
 | Visa       | 4614, 4716       |