CLDC-1931 Update financial year validation message (#1266)

config/locales/en.yml

@@ -149,7 +149,7 @@ en:
       intermediate_rent_product_name:
         blank: "Enter name of other intermediate rent product"
       saledate:
-        financial_year: "Date must be from 22/23 financial year"
+        financial_year: "Date must be from 22/23 financial year, which is between 1st April 2022 and 31st March 2023"
       startdate:
         later_than_14_days_after: "The tenancy start date must not be later than 14 days from today’s date"
         before_scheme_end_date: "The tenancy start date must be before the end date for this supported housing scheme"