add partial for how to grant c2c permissions [#154251675]

config/template_variables.yml

@@ -102,6 +102,7 @@ template_variables:
   ga_account_id: UA-22181585-2
   gen_GSG:
   global_auditor_role:  <ul><li><strong>Global Auditor</strong> is a user role that has been assigned the <code>cloud_controller.global_auditor</code> scope in UAA. This role has read-only access to all Cloud Controller API resources except for secrets such as environment variables. The Global Auditor role cannot access those values.</li></ul>
+  grant_devs_c2c: edit your BOSH manifest to include the <code>cf_networking.enable_space_developer_self_service</code> property and set that property to <code>true</code>
   GSG_intro_sentence:
   http_routing: For more information, see the [Securing Traffic into Cloud Foundry](../adminguide/securing-traffic.html) topic.
   info_loc: In your Cloud Foundry deployment manifest