Fix invalid ref in UserDefinedLogicalNodeCore doc #12396
Merged
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Which issue does this PR close?
Closes #12280
Rationale for this change
One of the links in

datafusion::logical_expr::UserDefinedLogicalNodeCoredoc throws an invalid resourceWhat changes are included in this PR?
Referring to the file in a different module is abit tricky to I chose to refer to a remote Github file instead
Are these changes tested?
Its a doc change so no test is needed (I think)
Are there any user-facing changes?
Yes. It will change the API doc