fix documentation of prompt ownership and visibility (#684)

The docs were incorrect about prompt visibility.

Author: sqs

docs/cody/capabilities/commands.mdx

@@ -21,14 +21,19 @@ Click the **New prompt** button on the **Prompt Library** page to create a new p
 - Select the **Owner** and **Name** of the prompt
 - Then, write a prompt description
 - And finally, fill out the **Prompt template** box with all your prompt instructions
-- Moreover, you can mark your prompt as **Draft**. This would prevent it from being available to other users
+- Moreover, you can mark your prompt as **Draft**.
 - Once done, click the **Create prompt** button
 
+The prompt is visible to and usable by:
+
+- The prompt's owner: if the prompt's owner is a user
+- All members of the organization: if the prompt's owner is an organization
+- Everyone: if the prompt is marked **Public** (which only site admins can do)
+
 Completing this process will do the following:
 
 - The new prompt will be added to the **Prompt Library** page
-- If it's not a draft, it will be available to other users in your organization
-- The prompt will start appearing via your connected Sourcegraph instance inside Cody's VS Code extension and the Sourcegraph Web UI
+- The prompt will appear in the Prompts list in Cody (in the editor and on the web)
 
 ![prompts-in-vscode](https://storage.googleapis.com/sourcegraph-assets/Docs/prompts-ui-vscode-082024.png)