DOC: Added note acknowledging iloc dtype conversion behaviour

[zihengliao]

Added a note clarifying dtype conversions for returned outputs of the .iloc function

• closes BUG: use of iloc with heterogeneous DataFrame sometimes performs undocumented conversions #61537
• All code checks passed.

[simonjayhawkins]

Thanks @zihengliao for the PR.

Is this addition correct and in the correct part of the documentation?

The issue is about the return type when selecting rows from a homogeneous DataFrame. .iloc was used in the example but the issue is not about .iloc per se. There are other methods that can return rows where this coercion also occurs?

Also, note that .iloc can return, as well as rows, multiple rows, columns and multiple columns. So there are cases when the added statement is not correct so more context is needed?

Note that the issue is still tagged Needs Triage so no agreement on a solution has been reached or even yet discussed?

[mroeschke]

Agreed, closing this pull request until more discussion has happened in the issue.