DOC: Update whatsnew

[TomAugspurger]

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[TomAugspurger]

Ignoring codecov failure.

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

$ git checkout 0.25.x $ git pull 

2. Cherry pick the first parent branch of the this PR on top of the older branch:

$ git cherry-pick -m1 7f6ba6b353e63e004c293cfa4b7d3a23bda4cc5a 

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

$ git commit -am 'Backport PR #28073: DOC: Update whatsnew' 

4. Push to a named branch :

git push YOURFORK 0.25.x:auto-backport-of-pr-28073-on-0.25.x 

5. Create a PR against branch 0.25.x, I would have named this PR:

"Backport PR #28073 on branch 0.25.x"

And apply the correct labels and milestones.

Congratulation you did some good work ! Hopefully your backport PR will be tested by the continuous integration and merged soon!

If these instruction are inaccurate, feel free to suggest an improvement.