rename invite code field

bubble-server/src/main/resources/message_templates/en_US/server/pre_auth/ResourceMessages.properties

@@ -259,7 +259,7 @@ field_label_unlock_key=Unlock Key
 form_title_register=Register
 field_label_contactType=Contact Type
 field_label_email=Email
-field_label_promoCode=Promo Code
+field_label_promoCode=Beta Invite Code
 field_label_sms=SMS Phone
 field_label_agreeToTerms=By checking this box, you agree to our <a target="_blank" rel="noopener" href="https://bubblev.com/pages/privacy">Privacy Policy</a> and <a target="_blank" rel="noopener" href="https://bubblev.com/pages/terms">Terms of Service</a>.
 message_login_agreeToTerms=By logging in, you agree to the <a target="_blank" rel="noopener" href="https://bubblev.com/pages/privacy">Privacy Policy</a> and <a target="_blank" rel="noopener" href="https://bubblev.com/pages/terms">Terms of Service</a>.