Update messages_es_ES.properties

[Ludy87]

Description

Please provide a summary of the changes, including relevant motivation and context.

Closes #(issue_number)

Checklist:

• [ ] I have read the Contribution Guidelines
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] My changes generate no new warnings

Contributor License Agreement

By submitting this pull request, I acknowledge and agree that my contributions will be included in Stirling-PDF and that they can be relicensed in the future under the MPL 2.0 (Mozilla Public License Version 2.0) license.

(This does not change the general open-source nature of Stirling-PDF, simply moving from one license to another license)

[github-actions[bot]]

🚀 Translation Verification Summary

📋 Checking with the file messages_en_GB.properties from the pr-branch - Checking the pr-branch

🗂️ Checking File: messages_de_DE.properties...

• Test 1 Status: ✅ Passed

• Test 2 Status: ✅ Passed

🗂️ Checking File: messages_es_ES.properties...

• Test 1 Status: ✅ Passed

• Test 2 Status: ✅ Passed

🗂️ Checking File: messages_et_EE.properties...

• Test 1 Status: ✅ Passed

• Test 2 Status: ✅ Passed

✅ Overall Check Status: Success