Add steps to enable auto-edit feature

This change adds two additional steps to the instructions for enabling the auto-edit feature for Cody Enterprise customers. Specifically, it requires site administrators to allow the Fireworks provider as an allowed provider, in addition to enabling the feature flag

Author: jdorfman

docs/cody/capabilities/auto-edit.mdx

@@ -25,7 +25,8 @@ Eligible Cody Pro users will gradually be given access to the auto-edit feature.
 Auto-edit is available for Enterprise customers with [Sourcegraph Cody Gateway](/cody/core-concepts/cody-gateway#sourcegraph-cody-gateway) access. Enabling the feature requires two steps:
 
 1. Site administrators must enable the feature flag `cody-autoedit-experiment-enabled-flag`
-2. Once enabled, developers will receive a notification in their editor to turn it on
+2. They also need to allow the Fireworks provider as an allowed provider as [suggested here](https://sourcegraph.com/docs/cody/enterprise/model-configuration#model-filters)
+3. Once enabled, developers will receive a notification in their editor to turn it on
 
 ## How does auto-edit work?