Agents are not invocable with slash command

Author: ntrogh

docs/copilot/customization/prompt-files.md

@@ -23,7 +23,7 @@ Use prompt files to:
 * Override default behavior of a custom agent, such as creating a minimal implementation plan or generating mockups for API calls
 
 > [!TIP]
-> **Prompt files, agents, or skills?** All three can be invoked as slash commands. Use prompt files for lightweight, single-task prompts. Use [custom agents](/docs/copilot/customization/custom-agents.md) when you need a persistent persona with its own tool restrictions and handoffs. Use [agent skills](/docs/copilot/customization/agent-skills.md) when you need a portable, multi-file capability with scripts and resources.
+> **Prompt files, agents, or skills?** Use prompt files for lightweight, single-task prompts. Use [custom agents](/docs/copilot/customization/custom-agents.md) when you need a persistent persona with its own tool restrictions and handoffs. Use [agent skills](/docs/copilot/customization/agent-skills.md) when you need a portable, multi-file capability with scripts and resources.
 
 > [!TIP]
 > Use the [Chat Customizations editor](/docs/copilot/customization/overview.md#chat-customizations-editor) (Preview) to discover, create, and manage all your chat customizations in one place. Run **Chat: Open Chat Customizations** from the Command Palette.