[Rspamd] Fix little typo in regex (#4050)

There was a dot missing, right? Correct me if I'm wrong...

data/conf/rspamd/custom/bulk_header.map

@@ -1,5 +1,5 @@
 /X-EMV-Platform; .*/i
-/.*nur-1-click*/i
+/.*nur-1-click.*/i
 /.*episerver.*/i
 /.*supergewinne.*/i
 /List-Unsubscribe.*nbps\.eu/i