feat: add translation processes

[lwasser]

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• To see the specific tasks where the Asana app for GitHub is being used, see below:
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[flpm]

Made two minor additions.

We should also consider adding a process to start a new language translation: if someone volunteers to work on a new language, who makes the go-ahead decision, designates the translation group/lead, etc.

Back when I wrote the Translation guide for contributors I added a bit of information for the technical steps here but no other guidance.

[flpm]

Suggested change

* The command can be used for any language by swapping out the language tag at the end. A list of Sphinx language tags can be [found here](https://www.sphinx-doc.org/en/master/usage/configuration.html#confval-language).

* The command can be used for any language by swapping out the language tag at the end. The current list of languages that are being actively worked on can be found in the [Packaging Guide noxfile.py](https://github.com/pyOpenSci/python-package-guide/blob/d0c05fac6c28097e60b7206e1ba5314ab869804c/noxfile.py#L45) file. A complete list of Sphinx language tags can be [found here](https://www.sphinx-doc.org/en/master/usage/configuration.html#confval-language).

[flpm]

Suggested change

	Use CI to automatically tag the PR with the translation and the proper language tags.
	- Use CI to automatically tag the PR with the translation and the proper language tags.
	- Use CI to automatically keep the translation files updated once a translation has been released (work in progress [PR #397](https://github.com/pyOpenSci/python-package-guide/pull/397))