Add additional_info field to form requirements

Include extra guidance for the user to specify their timezone. This aims to reduce ambiguity and ensure better form submissions. The change is minimal but improves overall user experience.

src/components/form/data/apply.tsx

@@ -89,6 +89,7 @@ export const apply: FormData = {
             min_length: 3,
             max_length: 256,
             required: true,
+            additional_info: "Please include your timezone."
         },
         {
             label: "Do you have any previous experience being staff?",