fix(rutracker): fix first post

src/background/strategies/rutracker.js

@@ -30,7 +30,7 @@ module.exports = class Rutracker
 		return {
 			name: topicTitle,
 			poster: $('.post_body .postImgAligned').attr('title'),
-			description: $('.post_body').text(),
+			description: $('.post_body').first().text(),
 			rutrackerThreadId: parseInt($('a.magnet-link').attr('data-topic_id')),
 		}
 	}