Do not clone the whole Talk repository for integration tests

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

.drone.yml

@@ -1373,7 +1373,7 @@ steps:
   commands:
     # JavaScript files are not used in integration tests so it is not needed to
     # build them.
-    - git clone https://github.com/nextcloud/spreed apps/spreed
+    - git clone --depth 1 https://github.com/nextcloud/spreed apps/spreed
 - name: integration-sharing-v1-video-verification
   image: nextcloudci/integration-php7.3:integration-php7.3-2
   commands: