Vouch request: edit es_ES translations

[dmunozv04]

What do you want to change?

I'd like to update the translations for the es_ES locale for v1.4: #13766

Why do you want to make this change?

I'm a native Spanish speaker and would like for the newly added strings to be translated to my language

I enjoy contributing to OSS projects, and I already contributed (a simple docs fix) to Ghostty before the vouch system was implemented: #8639

I acknowledge that:

• I have read the Contributing Guide and understand the contribution process.
• I have read and agree to follow the AI Usage Policy.
• I wrote this vouch request myself, in my own voice, without AI generating it.

[jcollie]

!vouch