Update notification read marking to use current time instead of last read time

Author: yegor256

0pdd.rb

@@ -320,9 +320,8 @@
       end
     end
     "#{repo}: #{reason}"
-  ensure
-    gh.mark_notifications_as_read(last_read_at: n['last_read_at'])
   end
+  gh.mark_notifications_as_read(last_read_at: Time.now)
   "#{msgs.join("\n")}\n"
 end