Use the label the personal autocomplete setting actually carries

The page told a user to toggle Autocomplete Generation in their own settings, which is the administrator label. The personal control reads Prompt Autocompletion, so someone searching their settings for the documented name finds nothing and concludes the feature is missing or that a global switch has hidden it.

The step now names the personal label and records that the two names belong to the same feature, so either term leads to the right control.

Author: Classic298

docs/features/chat-conversations/chat-features/autocomplete.md

@@ -45,7 +45,9 @@ Go to **Admin Settings > Interface > Task Model** and toggle **Autocomplete Gene
 Even if enabled globally, individual users can turn it off for themselves if they find it distracting.
 
 - Go to **Settings > Interface**.
-- Toggle **Autocomplete Generation**.
+- Toggle **Prompt Autocompletion**.
+
+The personal setting carries a different label from the administrator one, which reads **Autocomplete Generation**. They control the same feature.
 
 :::note
 If the Admin has disabled Autocomplete globally, users will **not** be able to enable it in their personal settings.