Update pt-PT.json5

[rsaraivac]

Extensive revision of i18n pt-PT with the news translation strings introduced by DSpace v8.0 and other improvements > last updated 18th of july 2024.

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[paulo-graca]

Thank you @rsaraivac for this contribution!
Could you please check my comments? You are using some Brazilian Portuguese written words. Can you please change them?

[paulo-graca]

Please ignore my suggestions.

[dspace-bot]

Successfully created backport PR for dspace-8_x:

• [Port dspace-8_x] Update pt-PT.json5 #3508