translation to `es` (Spanish)

[github-actions]

🚀 Automated messages will be posted here after:

• app/src/main/res/values-es/strings.xml is modified (and translation or review is needed).
• a pull request updates the translation.
• a tagged release publishes an update.

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Subscribe to this issue to monitor for updates to the es translation.
See CONTRIBUTING.md for translation guidelines.