wchess example has not working link in README.md

[trivalik]

At https://github.com/ggml-org/whisper.cpp/tree/master/examples/wchess the path https://whisper.ggerganov.com/wchess/ to online demo is not working.

@ggerganov I think you are the hoster.

[ggerganov]

@danbev We should add the wchess example to the examples-wasm.yml workflow.

[danbev]

@ggerganov Yes, I'll take a look at this.

[trivalik]

perfect!