fix(player): remove vjs-ended class on seeked (#5728)

Whenever we seek after the video has ended, we are no longer ended and
therefore we should remove the vjs-ended class.

Fixes #5654.

src/js/player.js

@@ -1728,6 +1728,7 @@ class Player extends Component {
   */
  handleTechSeeked_() {
    this.removeClass('vjs-seeking');
    this.removeClass('vjs-ended');
    /**
     * Fired when the player has finished jumping to a new time
     *