podcast:value is allowed in multiple channel elements

[jamescridland]

If you try to validate this feed then the validator kicks an error:

Multiple channel <podcast:value> elements are not allowed[[podcastindex]](https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#value)

The podcast:value tag is now allowed multiple times, to allow for access to multiple payment methods.

I've submitted a pull request to the documentation on Podcast Index, at Podcastindex-org/podcast-namespace#431

The line at

livewire-validator/validator-worker/static/app.js

Line 2880 in 97875a2

const value = ElementValidation.forSingleChild(level, node, callbacks, podcastIndexReference('https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#value'), ...Qnames.PodcastIndex.value).checkRequiredAttribute('type', isPodcastValueTypeSlug).checkRequiredAttribute('method', isNotEmpty).checkOptionalAttribute('suggested', isDecimal).checkRemainingAttributes().node;

is the one that checks for single elements, and should probably be deleted.

[johnspurlock-skymethod]

This was implemented back in 132f302 once it was added to the namespace!