Update rstan's stanc.js on nightly release

[andrjohns]

This PR adds a step to the Jenkinsfile stage for nightly releases to also update rstan's bundled stanc.js.

@serban-nicusor-toptal would you be able to check whether I've specified the credentials/config correctly? Thanks!

Submission Checklist

• Run unit tests
• Documentation
  • If a user-facing facing change was made, the documentation PR is here:
  • OR, no user-facing changes were made

Release notes

Update develop rstan on nightly release of new stanc.js

Copyright and Licensing

By submitting this pull request, the copyright holder is agreeing to
license the submitted work under the BSD 3-clause license (https://opensource.org/licenses/BSD-3-Clause)

[serban-nicusor-toptal]

Besides those two comments, it all looks good!
You can find a good recent example here: https://github.com/stan-dev/quarto-config/blob/main/Jenkinsfile
Just let me know if I can help, glad to do so!

[andrjohns]

Besides those two comments, it all looks good! You can find a good recent example here: https://github.com/stan-dev/quarto-config/blob/main/Jenkinsfile Just let me know if I can help, glad to do so!

Thanks! I think the latest changes should do it