README: Fix date of preprint (was too optimistic...)

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Tom Brown 2021-06-01 17:42:14 +02:00
parent 4bc5d94d42
commit e542efd552

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@ -14,7 +14,7 @@ problems that distort the results. See the github repository
[issues](https://github.com/PyPSA/pypsa-eur-sec/issues) for some of
the problems (please feel free to help or make suggestions). There is
neither documentation nor a paper yet, but we hope to have a preprint
out by summer 2020. We cannot support this model if you choose to use
out by autumn 2021. We cannot support this model if you choose to use
it.