Add "noopener" or "noreferrer" to external links

[epinzur]

Description

It would be great if quarto automatically updated external links to include rel="noopener" or rel="noreferrer"

See https://developer.chrome.com/docs/lighthouse/best-practices/external-anchors-use-rel-noopener/

[mcanouil]

@dragonstyle I believe this would be easy to add alongside the external links feature (https://quarto.org/docs/output-formats/html-basics.html#external-links).
What do you think?

[dragonstyle]

I think this would be easy (and I enabled it for our next pre-release build)!

f0cd90d

[mcanouil]

Thanks @dragonstyle!
Closing this as resolved!