dead link inside https://www.w3.org/TR/xpath-functions-31/#schemata.

[zadeck]

Describe the issue
The link to find xpath-functions.xsd which is
https://www.w3.org/TR/xpath-functions-31/xpath-functions.xsd is dead.

This link is contained in https://www.w3.org/TR/xpath-functions-31/#schemata.

Note that the links to find the other two schemas in this section both work. This bug is also there for version 3.0.
To reproduce
try the link in the first section.

Expected behavior
to find a copy of the schema file

Screenshots
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Additional context
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