Update docs to reflect ext_pillar taking a list

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/README.Salt b/README.Salt
index 9d9292f..e9777cd 100644
--- a/README.Salt
+++ b/README.Salt
@@ -66,8 +66,8 @@
          inventory_base_uri: /srv/salt
 
      ext_pillar:
-       reclass:
-         inventory_base_uri: /srv/salt
+       - reclass:
+           inventory_base_uri: /srv/salt
 
      Currently, there is no way to unify these configuration data, but it's
      hardly much to duplicate. In the future, I may provide for a global