Fix deep link in doc (#8276)

Author: pierceboggan

docs/copilot/chat/mcp-servers.md

@@ -227,8 +227,8 @@ code --add-mcp "{\"name\":\"my-server\",\"command\": \"uvx\",\"args\": [\"mcp-se
 VS Code also includes a URL handler that you can use to install an MCP server. To form the URL, construct an `obj` object in the same format as you would provide to `--add-mcp`, and then create the link by using the following logic:
 
 ```typescript
-// For Insiders, use `code-insiders` instead of `code`
-const link = `code:mcp/install?${encodeURIComponent(JSON.stringify(obj))`;
+// For Insiders, use `vscode-insiders` instead of `code`
+const link = `vscode:mcp/install?${encodeURIComponent(JSON.stringify(obj))`;
 ```
 
 This link can be used in a browser, or opened on the command line, for example via `xdg-open $LINK` on Linux.