[meta] fix yaml indent (#1698)

Author: jmlrt

.ci/jobs.t/elastic+helm-charts+{branch}+integration-kibana.yml

@@ -33,8 +33,8 @@
           unset VAULT_ROLE_ID VAULT_SECRET_ID
           set -x
 
-        BRANCH_NAME="%BRANCH%"
-        cluster_name="helm-${KUBERNETES_VERSION//./}-${BRANCH_NAME//./}"
+          BRANCH_NAME="%BRANCH%"
+          cluster_name="helm-${KUBERNETES_VERSION//./}-${BRANCH_NAME//./}"
 
           cd helpers/terraform/
           ./in-docker make integration KUBERNETES_VERSION=${KUBERNETES_VERSION} CLUSTER_NAME=${cluster_name} SUITE=${KIBANA_SUITE} CHART=kibana