Update acct_nt.mdx

Co-authored-by: Zachava96 <[email protected]>

acct_nt.mdx

@@ -75,7 +75,7 @@ Add up all the transactions between the two timestamps, with incoming transactio
 <details>
 <summary>Spoilers for acct_nt's solutions </summary>
 
-Look at the timestamps that acct_nt gives you, and add up all the transactions where you gained money from the starting timestamp to the end. The actual starting and ending timestamps may be a bit off from what acct_nt gives you.
+Add up all the incoming transactions between the two timestamps. The actual starting and ending timestamps may be incorrect by up to one minute.
 
 </details>