po: Update pt.po

Here is the Git patch of the updated GnuPG pt.po translation.

From d05a67bc357752ab64521a34bdd4bb461998d78d Mon Sep 17 00:00:00 2001
From: Daniel Cerqueira <dan.git@lispclub.com>
Date: Fri, 2 Aug 2024 14:21:47 +0100
Subject: [PATCH GnuPG] po: Update Portuguese Translation.

Backported-from-master: d73beb5398c6052ff0c091903d0bd6990bd69dc7
(I hope that I did not break too much)

• Signed-off-by: Daniel Cerqueira <dan.git@lispclub.com>