Add a note in documentation for incorrect results involving skip without order by in split query

[smitpatel]

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See https://github.com/dotnet/efcore/issues/21202

[smitpatel]

This is currently target of https://go.microsoft.com/fwlink/?linkid=2196526 Update the link target when doc is written.

[roji]

@ajcvickers the note was added in https://learn.microsoft.com/en-us/ef/core/querying/single-split-queries#split-queries, can you update the fwlink to link there?