Reword instructions for data entry in the file preparation template

app/views/bulk_upload_lettings_logs/forms/prepare_your_file.html.erb

@@ -20,7 +20,7 @@
       <h2 class="govuk-heading-s">Create your file</h2>
 
       <%= govuk_list [
-        "Fill in the template with data from your housing management system. Your data should go below the headers, with one row per log. Leave column A blank below the headers - your data should start in column B.",
+        "Fill in the template with data from your housing management system. Your data should go below the headers, with one row per log - your data should start in column B.",
         "Make sure each column of your data aligns with the matching headers above. You may need to reorder your data.",
         "Use the #{govuk_link_to "Lettings bulk upload Specification (#{@form.year_combo})", @form.specification_path} to check your data is in the correct format.".html_safe,
         "<strong>Username field:</strong> To assign a log to someone else, enter the email address they use to log into CORE.".html_safe,

app/views/bulk_upload_sales_logs/forms/prepare_your_file.html.erb

@@ -20,7 +20,7 @@
 
       <h2 class="govuk-heading-s">Create your file</h2>
       <%= govuk_list [
-        "Fill in the template with data from your housing management system. Your data should go below the headers, with one row per log. Leave column A blank below the headers - your data should start in column B.",
+        "Fill in the template with data from your housing management system. Your data should go below the headers, with one row per log - your data should start in column B.",
         "Make sure each column of your data aligns with the matching headers above. You may need to reorder your data.",
         "Use the #{govuk_link_to "Sales bulk upload Specification (#{@form.year_combo})", @form.specification_path} to check your data is in the correct format.".html_safe,
         "<strong>Username field:</strong> To assign a log to someone else, enter the email address they use to log into CORE.".html_safe,