Change TNC2025 to TNC25 in checkout page

stripe_checkout/stripe_checkout/templates/checkout.html

@@ -10,7 +10,7 @@
                 <h1 class="card-header primary">Please confirm your payment</h1>
                 <div class="leader">Please finalize your registration by clicking CONFIRM below and choosing your
                 payment method. Only after you have confirmed, and we have received your payment, is your
-                registration for TNC2025 complete.
+                registration for TNC25 complete.
                 </div>
                 <div class="card-content center gap">
                     <div>