Remove extra space in shareOptions.embedCode of player script

Follow lint indications :
https://github.com/iv-org/invidious/pull/2912#discussion_r811367117

assets/js/player.js

@@ -77,7 +77,7 @@ var shareOptions = {
     image: player_data.thumbnail,
     get embedCode() {
         return "<iframe id='ivplayer' width='640' height='360' src='" +
-            addCurrentTimeToURL(embed_url) + "' style='border:none;'></iframe>";    
+            addCurrentTimeToURL(embed_url) + "' style='border:none;'></iframe>";
     }
 };