chore(doc): auto generate docs

Author: github-actions[bot]

doc/CopilotChat.txt

@@ -190,6 +190,9 @@ API ~
     -- Get all available prompts (can be used for integrations like fzf/telescope)
     local prompts = chat.prompts()
 
+    -- Get last copilot response (also can be used for integrations and custom keymaps)
+    local response = chat.response()
+    
     -- Pick a prompt using vim.ui.select
     local actions = require("CopilotChat.actions")