Restructure offset deprecation whatsnew

[phofl]

Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

Personally, I'd prefer having a table with for -> after instead of the text blocks, that might make it easier to use.

Shorter headline would also be helpful I guess and direct folks more towards the direct mapping

thoughts @natmokval ?

Documentation problem

see

Suggested fix for documentation

see

[natmokval]

Thank you, @phofl, I agree, a table will look better than the text block.
I replaced offset deprecation text block with a table and made the headline shorter. Could you please take a look at my PR #56364?