gitlab-ci: reduce verbosity of binary upload

Tell `ssh` not to print informational messages.

.gitlab/upload.yml

@@ -15,4 +15,4 @@
         - dnf install -y --setopt=install_weak_deps=False rsync openssh-clients
         - chmod 400 $RSYNC_BINARY_KEY
         - ssh-keygen -y -f $RSYNC_BINARY_KEY > $RSYNC_BINARY_KEY.pub
-        - rsync -tv --recursive -e "ssh -i $RSYNC_BINARY_KEY -o StrictHostKeyChecking=no" build/ [email protected]:$RSYNC_DESTINATION/
+        - rsync -tv --recursive -e "ssh -i $RSYNC_BINARY_KEY -o StrictHostKeyChecking=no -o LogLevel=ERROR" build/ [email protected]:$RSYNC_DESTINATION/