Fixing compatibility with 2017.7

Change-Id: I3d84d94928ec3051e83b4b3fc05844f3bdc40f13
diff --git a/reclass/meta/sphinx.yml b/reclass/meta/sphinx.yml
index d7ce88f..8ef68ec 100644
--- a/reclass/meta/sphinx.yml
+++ b/reclass/meta/sphinx.yml
@@ -7,7 +7,7 @@
       name: storage
       param:
         version:
-          value: {{ salt['cmd.run']('reclass --version') }}
+          value: {{ salt['cmd.shell']('reclass --version', python_shell=True) }}
         {%- if storage.data_source.engine == "git" %}
         source_repository:
           value: {{ storage.data_source.address }}