Challenge Details - Payment text

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Update the "Payments" section on the challenge page to this:

Topcoder will compensate members in accordance with the our standard payment policies, unless otherwise specified in this challenge. For information on payment policies, setting up your profile to receive payments, and general payment questions, please refer to https://help.topcoder.com/hc/en-us/articles/217482038-Payment-Policies-and-Instructions