Make Astana capital again

[KentGrigo]

The capital of Kazakhstan has been changed back from Nur-Sultan to Astana as of September 2022:
https://www.theguardian.com/world/2022/sep/14/kazakhstan-to-change-name-of-capital-from-nur-sultan-back-to-astana

As the names just needed to be swapped, I tried to change it for all the languages.
But it'd be nice if someone with more knowledge about these various languages could double check the correctness.

[aplaice]

Merging to move forward. I'm still in favour of a range (possibly with a month, as before), but we can add that later, perhaps as part of #545.

(Alternatively, if the name is changed back again, we can revert this. :))

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I forgot to add a Fix #n keyword, while merging :/

[aplaice]

Oops; checking the translations (I thought that I had checked them previously and hence only looked through cursorily today), I think that the Spanish and Portuguese translations are wrong, with an unnecessary de. (The de was in the previous translation as part of marzo de 2019 ("March of 2019") and similarly for Portuguese.)

The Czech translation also has an unnecessary/wrong month (březen is March).

Edit: the gender is also wrong for Czech, Polish and Russian, I think. (Astana is female, unlike Nursultan.)