Updating feature flag for prompt UI v2

Author: alexAtSourcegraph

docs/cody/capabilities/commands.mdx

@@ -4,7 +4,7 @@
 
 ## Prompts
 
-<Callout type="note">Prompts and Prompts Library are currently available in Cody's VS Code extension and the Sourcegraph Web UI.</Callout>
+<Callout type="note">Prompts and Prompts Library are currently available in Cody's VS Code extension and the Sourcegraph Web UI. Some functionalities that are mentioned on this page need to be enabled by adding the following feature flag and setting it to true: _prompt-creation-v2_. [See here for instructions on how to create a feature flag](https://sourcegraph.com/docs/admin/executors/native_execution#enable). </Callout>
 
 Cody offers quick, ready-to-use **Prompts** to automate key tasks in your workflow. Prompts are created and saved in the **Prompt Library** and can be accessed from the **Tools > Prompt Library** in the top navigation bar in Sourcegraph's web UI.