add content for services.yaml in component media_extractor (#27608)

* add content for services.yaml for media_extractor component

* remove example data

* add empty line on end of file

* Update services.yaml

homeassistant/components/media_extractor/services.yaml

+play_media:
+  description: Downloads file from given url.
+  fields:
+    entity_id: 
+      description: Name(s) of entities to play media on.
+      example: 'media_player.living_room_chromecast'
+    media_content_id:
+      description: The ID of the content to play. Platform dependent.
+      example: 'https://soundcloud.com/bruttoband/brutto-11'
+    media_content_type:
+      description: The type of the content to play. Must be one of MUSIC, TVSHOW, VIDEO, EPISODE, CHANNEL or PLAYLIST MUSIC.
+      example: 'music'
+