Change activte mail template from minutes to hours

html_templates/activate_account_email.html

@@ -10,7 +10,7 @@ <h2 style="color: #27a9e1;"> Hey!</h2>
     <p style="font-size:18px;color: #030303;">It seems a account for you was created!</p>
     <p style="font-size:18px;color: #030303;">Follow this link to finish the registration and set a password for your account:</p>
     <p><a style="font-size:18px;display: inline-block; padding: 10px 20px; background-color: #27a9e1; color: #ffffff; text-decoration: none; border-radius: 5px;" href="{{url}}">Set password</a></p>
-    <b style="font-size:18px;color: #ff9999;">Note: This link will expire in {{expire_in_minutes}} minutes.</b>
+    <b style="font-size:18px;color: #ff9999;">Note: This link will expire in {{expire_in_hours}} hours.</b>
     <br>
     <hr style="border: 1px solid #CCCCCC;">
     <p style="font-size:14px;color: #888888;">If you've received this mail without filling a reqeust, it's likely that a user entered your email address by mistake. In that case, just ignore it.</p>