Text Changes: Improve the wording of the email sent to confirm site deletion.

Props NekoJonez, SergeyBiryukov, mukesh27, audrasjb.
See #56921.


git-svn-id: https://develop.svn.wordpress.org/trunk@54840 602fd350-edb4-49c9-b593-d223f7449a82

Author: audrasjb

src/wp-admin/ms-delete-site.php

@@ -65,11 +65,10 @@
 be asked to confirm again so only click this link if you are absolutely certain:
 ###URL_DELETE###
 
-If you delete your site, please consider opening a new site here
-some time in the future! (But remember your current site and username
-are gone forever.)
+If you delete your site, please consider opening a new site here some time in
+the future! (But remember that your current site and username are gone forever.)
 
-Thanks for using the site,
+Thank you for using the site,
 All at ###SITENAME###
 ###SITEURL###"
 	);