fix(translations): fix spanish translation for save buttons

[acardielf]

Spanish translation for 'Save' is ambiguous, because it has different meanings depending the context.

I've checked places where the word is used in the frontend side, and the better translation it's "Guardar" and not "Ahorrar" as it's translated just now.

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[acardielf]

I have read the CLA Document and I hereby sign the CLA