Fix xsd and requirement version linter errors

[bernt-matthias]

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[bernt-matthias]

For the XSD error we would need new packages: galaxyproject/galaxy#18605. Is it worth to create some, or wait for 24.2?

[mvdbeek]

There's zero cost to more packages. Do you want to try this again or should I do it ?

[bernt-matthias]

Let me try :)

[bernt-matthias]

Cool. This worked now (after resetting the pip cache).