Update screenshots

Signed-off-by: Joas Schilling <coding@schilljs.com>

README.md

@@ -45,7 +45,7 @@ A single video stream currently uses about 1 Mbit/sec and the total required ban
 1 Mbit/s * (participants - 1)
 ```
 
-![](https://github.com/nextcloud/spreed/raw/e419b79819963a631ce811ffed432853ec4723c2/docs/HPB-P2P.svg.png)
+![](https://github.com/nextcloud/spreed/raw/e419b79819963a631ce811ffed432853ec4723c2/docs/HPB-P2P.png)
 
 This means that in a call with 5 participants, each has to send and receive about 4 Mbit/sec. Given the asymetric nature of most typical broadband connections, it's sending video that quickly becomes the bottleneck. Moreover, decoding all those video streams puts a big strain on the system of each participant.
 

appinfo/info.xml

@@ -42,6 +42,7 @@ And in the works for the [coming versions](https://github.com/nextcloud/spreed/m
 
 	<screenshot>https://raw.githubusercontent.com/nextcloud/spreed/master/docs/call-in-action.png</screenshot>
 	<screenshot>https://raw.githubusercontent.com/nextcloud/spreed/master/docs/chat.png</screenshot>
+	<screenshot>https://raw.githubusercontent.com/nextcloud/spreed/master/docs/file-darg-and-drop.png</screenshot>
 	<screenshot>https://raw.githubusercontent.com/nextcloud/spreed/master/docs/screensharing.png</screenshot>
 	<screenshot>https://raw.githubusercontent.com/nextcloud/spreed/master/docs/video-verfication.png</screenshot>