DOC: update Security page

PyPI does not host detached PGP signatures anymore.

docs/security.rst

@@ -9,25 +9,16 @@
 Security
 ********
 
-Distributors are recommended to fetch release sources via the Git_ tags on our
-repository_, or the source distributions on the `meson-python PyPI page`_, both
+Distributors are recommended to fetch release sources via the Git tags
+on our repository_, or the source distributions on `PyPI`_. Git tags
 are PGP-signed with one of the following keys:
 
-- |3DCE51D60930EBA47858BA4146F633CBB0EB4BF2|_ *(Filipe Laíns)*
-- |52BDC33FD1FBAB569D47FFA923D9E5499A08BDC5|_ *(Ralf Gommers)*
+- |3DCE51D60930EBA47858BA4146F633CBB0EB4BF2|_ Filipe Laíns
+- |52BDC33FD1FBAB569D47FFA923D9E5499A08BDC5|_ Ralf Gommers
 
 
-.. admonition:: Fetching artifact signatures from PyPI_
-   :class: hint
-
-   To fetch the PGP signatures for artifacts on PyPI_, simply add ``.asc`` to
-   the artifact URL.
-
-
-.. _Git: https://git-scm.com/
 .. _repository: https://github.com/mesonbuild/meson-python
-.. _meson-python PyPI page: https://pypi.org/project/meson-python/
-.. _PyPI: https://pypi.org/
+.. _PyPI: https://pypi.org/project/meson-python/
 
 .. |3DCE51D60930EBA47858BA4146F633CBB0EB4BF2| replace:: ``3DCE51D60930EBA47858BA4146F633CBB0EB4BF2``
 .. _3DCE51D60930EBA47858BA4146F633CBB0EB4BF2: https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3dce51d60930eba47858ba4146f633cbb0eb4bf2