Re-add translation string that got wrongly removed (#1702)

translations/CHANGELOG.md

@@ -79,7 +79,7 @@
 * + mark_notifications_as_read
 ## 2017/10/31
 * + followers
-* ~ description_markdown_notice -> comment_markdown_notice
+* + comment_markdown_notice
 * + browsing_user_torrents
 * + delete_all_reports
 ## 2017/11/02

translations/en-us.all.json

@@ -535,6 +535,10 @@
     "id": "torrent_description",
     "translation": "Torrent Description"
   },
+  {
+    "id": "description_markdown_notice",
+    "translation": "Markdown can be used in description."
+  },
   {
     "id": "comment_markdown_notice",
     "translation": "Markdown can be used in comments."