docs: add label to translating so it can be referenced

[marcorichetta]

Added a label to fix the link to the translation guide in https://devguide.python.org/

• Tested it locally with makehtml

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📚 Documentation preview 📚: https://cpython-devguide--1619.org.readthedocs.build/

[python-cla-bot]

All commit authors signed the Contributor License Agreement.

[marcorichetta]

Closing it in favor of #1587

[StanFromIreland]

Thanks for the contribution, however, unfortunately like this pr, #1603 this was discussed and concluded that it will be fixed as part of #1587

[hugovk]

As #1587 is taking some time, let's just merge this.

[StanFromIreland]

@hugovk the other PR fixes all of the issues, I recommend it instead.

[StanFromIreland]

By other PR I meant #1603

[hugovk]

Yep, but I can't reopen that because the branch was deleted, so let's at least do this one.

Thanks!

[StanFromIreland]

Ah I did not realise that blocks it, as the diff is still visible. Also, if you have time I wouldn't mind the rest of your partial review:-)