DOC: Fix for excelwriter engine for ods files
From https://github.com/pandas-dev/pandas/pull/58831#discussion_r1642841812

Changing odswriter references to odfpy

```py
from pandas.io.excel._util import get_writer
get_writer('odswriter') # fails with ValueError: No Excel writer 'odswriter'
get_writer('odf') # works returning pandas.io.excel._odswriter.ODSWriter
```

That said, the library doesn't seem to be maintained. Maybe we should consider deprecating.
Thanks @asishm 

> That said, the library doesn't seem to be maintained. Maybe we should consider deprecating.

I would be +1 for that