Update reporter_disabled_ignore template (#22544)

follow-up for mozilla/addons-server#14928

src/olympia/abuse/templates/abuse/emails/reporter_disabled_ignore.txt

@@ -1,8 +1,11 @@
 Hello,
 
-Thank you for your report about {{ name }}, at {{ target_url }} that appeared to violate our policies..
+Thank you for your report about {{ name }}, at {{ target_url }} that appeared to violate our policies.
 
 As this content has already been removed before your report was reviewed, your report will not be processed.
+
+Thank you for your attention.
+
 [{{ reference_id }}]
 --
 Mozilla Add-ons Team