Update error messages

config/locales/en.yml

@@ -90,13 +90,13 @@ en:
             file:
               blank: "Select which file to upload."
               not_csv: "Your file must be in CSV format."
-              file_too_large: "File must be 10MB or less."
+              file_too_large: "File must be 10MB or less. Check your file and delete data that does not need to be uploaded."
         forms/bulk_upload_sales/upload_your_file:
           attributes:
             file:
               blank: "Select which file to upload."
               not_csv: "Your file must be in CSV format."
-              file_too_large: "File must be 10MB or less."
+              file_too_large: "File must be 10MB or less. Check your file and delete data that does not need to be uploaded."
         forms/bulk_upload_lettings/needstype:
           attributes:
             needstype:

spec/features/bulk_upload_lettings_logs_spec.rb

@@ -91,7 +91,7 @@ RSpec.describe "Bulk upload lettings log" do
       attach_file "file", file_fixture("2023_24_lettings_bulk_upload.xlsx")
       click_button("Upload")
 
-      expect(page).to have_content("File must be 10MB or less")
+      expect(page).to have_content("File must be 10MB or less. Check your file and delete data that does not need to be uploaded.")
     end
   end
   # rubocop:enable RSpec/AnyInstance

spec/features/bulk_upload_sales_logs_spec.rb

@@ -89,7 +89,7 @@ RSpec.describe "Bulk upload sales log" do
       attach_file "file", file_fixture("2023_24_lettings_bulk_upload.xlsx")
       click_button("Upload")
 
-      expect(page).to have_content("File must be 10MB or less")
+      expect(page).to have_content("File must be 10MB or less. Check your file and delete data that does not need to be uploaded.")
     end
   end
   # rubocop:enable RSpec/AnyInstance