Update email from rstudio to posit

[randyzwitch]

Confirmed with Kim B. that this alias does exist for Posit, so changing to keep branding consistent

[cwickham]

/deploy-preview

[randyzwitch]

Also exists here, possibly others

quarto-web/about.qmd

Line 68 in 1d928ed

2. For significant changes (e.g more than small bug fixes), ensure that you have signed the [individual](https://posit.co/wp-content/uploads/2023/04/2023-03-13_TC_Indiv_contrib_agreement.pdf) or [corporate](https://posit.co/wp-content/uploads/2023/04/2023-03-13_TC_Corp_contrib_agreement.pdf) contributor agreement as appropriate. You can send the signed copy to [jj\@rstudio.com](mailto:jj@rstudio.com){.email}.

[github-actions]

🚀 Deployed on https://deploy-preview-997--mystifying-jepsen-fa4396.netlify.app

[cwickham]

Thanks @randyzwitch !