[neon/qt6/pyside6/Neon/release] debian/upstream: Revert "Revert "fake signing-key.asc to make tooling happy""

[Carlos De Maine]

Git commit 09be937eb354159f3190f1182e7aa0533db5a512 by Carlos De Maine.
Committed on 09/01/2025 at 16:09.
Pushed by carlosdem into branch 'Neon/release'.

Revert "Revert "fake signing-key.asc to make tooling happy""

This reverts commit 16d1fd9a0af5a5d1cbb3598b69628b20a390635f

A  +0    -0    debian/upstream/signing-key.asc

https://invent.kde.org/neon/qt6/pyside6/-/commit/09be937eb354159f3190f1182e7aa0533db5a512

diff --git a/debian/upstream/signing-key.asc b/debian/upstream/signing-key.asc
new file mode 100644
index 00000000..e69de29b