c9s: Switch back to RPM-GPG-KEY-CentOS-SIG-Extras-SHA512

see https://gitlab.com/redhat/centos-stream/rpms/centos-release/-/commit/d11bd36e8491652d21ceca69e81ef7aeee433445

c9s.repo

@@ -20,7 +20,7 @@ baseurl=https://mirror.stream.centos.org/SIGs/9-stream/extras/$basearch/extras-c
 gpgcheck=1
 repo_gpgcheck=0
 enabled=1
-gpgkey=file:///usr/share/distribution-gpg-keys/centos/RPM-GPG-KEY-CentOS-SIG-Extras
+gpgkey=file:///usr/share/distribution-gpg-keys/centos/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
 
 [nfv]
 name=CentOS Stream 9 - NFV

extensions/Dockerfile

@@ -12,7 +12,7 @@ RUN if [[ -z "$COSA" ]] ; then ci/get-ocp-repo.sh ; fi
 RUN mkdir -p /usr/share/distribution-gpg-keys/centos
 RUN ln -s /etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial /usr/share/distribution-gpg-keys/centos/RPM-GPG-KEY-CentOS-Official
 RUN ln -s {/etc/pki/rpm-gpg,/usr/share/distribution-gpg-keys/centos}/RPM-GPG-KEY-CentOS-SIG-Cloud
-RUN ln -s {/etc/pki/rpm-gpg,/usr/share/distribution-gpg-keys/centos}/RPM-GPG-KEY-CentOS-SIG-Extras
+RUN ln -s {/etc/pki/rpm-gpg,/usr/share/distribution-gpg-keys/centos}/RPM-GPG-KEY-CentOS-SIG-Extras-SHA512
 RUN ln -s {/etc/pki/rpm-gpg,/usr/share/distribution-gpg-keys/centos}/RPM-GPG-KEY-CentOS-SIG-NFV
 RUN ln -s {/etc/pki/rpm-gpg,/usr/share/distribution-gpg-keys/centos}/RPM-GPG-KEY-CentOS-SIG-Virtualization
 RUN if [[ -n "${VARIANT}" ]]; then MANIFEST="manifest-${VARIANT}.yaml"; EXTENSIONS="extensions-${VARIANT}.yaml"; else MANIFEST="manifest.yaml"; EXTENSIONS="extensions.yaml"; fi && rpm-ostree compose extensions --rootfs=/ --output-dir=/usr/share/rpm-ostree/extensions/ ./"${MANIFEST}" ./"${EXTENSIONS}"