Update README.

Signed-off-by: Ivan Sein <ivan@nextcloud.com>
2019-06-17 10:17:19 +02:00 · 2019-06-17 10:17:19 +02:00 · 23d952c283
--- a/README.md
+++ b/README.md
@ -18,6 +18,7 @@ Nextcloud Talk lowers the barrier for communication and lets your team connect a

 ```
 $ pod install
+$ git submodule update --init
 $ open VideoCalls.xcworkspace
 ```