fix(extension-requests): replace lot terminology with assignment

src/app/(modules)/ticket/[ticketId]/components/actions/TicketExtensionRequestPanel.tsx

@@ -258,7 +258,7 @@ export function TicketExtensionRequestPanel({
     if (!canRequest) {
       return (
         <p className="text-sm text-muted-foreground">
-          No extension request history is available for this ticket lot.
+          No extension request history is available for this ticket assignment.
         </p>
       );
     }