CLDC-2192 Copy changes for bulk upload checking file page (#1550)

# Context

- https://digital.dclg.gov.uk/jira/browse/CLDC-2192

# Changes

- Copy changes for bulk upload checking file page

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

@@ -10,14 +10,14 @@
       <span class="govuk-caption-l">Upload lettings logs in bulk (<%= @form.year_combo %>)</span>
       <h1 class="govuk-heading-l">We’re checking the file</h1>
 
-      <h2 class="govuk-heading-m">Once this is done, we’ll email you the outcome.</h2>
+      <h2 class="govuk-heading-s">Once this is done, we’ll email you the outcome.</h2>
 
       <p class="govuk-body">
-        We’re checking for any missing data, issues or errors. Depending on the file size, this could take a few minutes.
+        We’re checking for any missing data, issues or errors. Depending on file size, this could take a few minutes.
       </p>
 
       <p class="govuk-body">
-        If there are errors we will email you a link to view all the errors.
+        If there are errors, we will email you to let you know how to fix them.
       </p>
 
       <p class="govuk-body">

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

@@ -10,14 +10,14 @@
       <span class="govuk-caption-l">Upload sales logs in bulk (<%= @form.year_combo %>)</span>
       <h1 class="govuk-heading-l">We’re checking the file</h1>
 
-      <h2 class="govuk-heading-m">Once this is done, we’ll email you the outcome.</h2>
+      <h2 class="govuk-heading-s">Once this is done, we’ll email you the outcome.</h2>
 
       <p class="govuk-body">
-        We’re checking for any missing data, issues or errors. Depending on the file size, this could take a few minutes.
+        We’re checking for any missing data, issues or errors. Depending on file size, this could take a few minutes.
       </p>
 
       <p class="govuk-body">
-        If there are errors we will email you a link to view all the errors.
+        If there are errors, we will email you to let you know how to fix them.
       </p>
 
       <p class="govuk-body">