DOC: add PGP public key for rgommers to security page

Author: rgommers

docs/security.rst

@@ -14,6 +14,7 @@ repository_, or the source distributions on the `meson-python PyPI page`_, both
 are PGP-signed with one of the following keys:
 
 - |3DCE51D60930EBA47858BA4146F633CBB0EB4BF2|_ *(Filipe Laíns)*
+- |52BDC33FD1FBAB569D47FFA923D9E5499A08BDC5|_ *(Ralf Gommers)*
 
 
 .. admonition:: Fetching artifact signatures from PyPI_
@@ -30,3 +31,6 @@ are PGP-signed with one of the following keys:
 
 .. |3DCE51D60930EBA47858BA4146F633CBB0EB4BF2| replace:: ``3DCE51D60930EBA47858BA4146F633CBB0EB4BF2``
 .. _3DCE51D60930EBA47858BA4146F633CBB0EB4BF2: https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3dce51d60930eba47858ba4146f633cbb0eb4bf2
+
+.. |52BDC33FD1FBAB569D47FFA923D9E5499A08BDC5| replace:: ``52BDC33FD1FBAB569D47FFA923D9E5499A08BDC5``
+.. _52BDC33FD1FBAB569D47FFA923D9E5499A08BDC5: https://github.com/rgommers.gpg