fix: update demo source code reference

[emmanuel-ferdman]

First of all, thank you for your contribution! :-)

Please makes sure that these checkboxes are checked before submitting your PR, thank you!

• [x] Make sure that you follow antd's code convention.
• [x] Run npm run lint and fix those errors before submitting in order to keep consistent code style.
• [x] Rebase before creating a PR to keep commit history clear.
• [x] Add some descriptions and refer relative issues for you PR.

Commit 172351325731eeabf80b0cc5cd145625fceedf10 moved the demo source code. This PR adjusts sources to changes.

[1uokun]

Thanks for your PR, but the basic.md file is no longer used