Expat (XML parser) is understaffed and needs funding

I would not have found the call for funding help if they didn't point it out here:

https://github.com/libexpat/libexpat/blob/R_2_6_2/expat/Chan...

I don't understand why there isn't a donate / sponsor button on the README / website to support development of this and instead it's hidden somewhere.

Maintainers it is perfectly OK to ask the public to donate or ask for sponsorships.

If xz taught any anything we don't want to be in that situation again.