add info about DEMetropolis(tune=...) changes

pymc-devs · Dec 19, 2019 · 6ea007e · 6ea007e
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diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
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 ### New features
 - use [fastprogress](https://github.com/fastai/fastprogress) instead of tqdm [#3693](https://github.com/pymc-devs/pymc3/pull/3693)
+- `DEMetropolis` can now tune both `lambda` and `scaling` parameters, but by default neither of them are tuned. See [#3743](https://github.com/pymc-devs/pymc3/pull/3643) for more info.
 
 ## PyMC3 3.8 (November 29 2019)