Route /llms.txt to the release worker

[araujogui]

Route the new llms.txt generated by doc-kit to release worker

[richardlau]

I don't think this file exists. AFAICT it is not being generated in the nodejs/node repo with the new doc-kit workflow.

[flakey5]

AFAICT it is not being generated in the nodejs/node repo with the new doc-kit workflow.

@araujogui has a pr up for it nodejs/node#62027

[araujogui]

@richardlau the file exists now and it's included on v26.3.0 release: https://nodejs.org/download/release/v26.3.0/docs/llms.txt