fix indentation in pkg.install

Change-Id: I93beb62eae18bb34aa024686146993dab5726def
diff --git a/etcd/server/service.sls b/etcd/server/service.sls
index 2ef7d31..5fb8dc7 100644
--- a/etcd/server/service.sls
+++ b/etcd/server/service.sls
@@ -44,7 +44,7 @@
   pkg.installed:
     - pkgs:
 {%- for pkg in _support_pkgs %}
-    - {{ pkg }}
+      - {{ pkg }}
 {%- endfor %}
 
 {%- endif %}