hddolby: add MR

Global minimum ratio ranges between 0.4-1.2 depending on amount downloaded. No mention of MR or MST for individual torrents.
https://www.hddolby.com/faq.php

src/Jackett.Common/Definitions/hddolby.yml

@@ -143,6 +143,8 @@ search:
         img.pro_free2up: 2
         img.pro_2up: 2
         "*": 1
+    minimumratio:
+      text: 1.2
     description:
       selector: td.rowfollow:nth-child(2)
       remove: a, img