Update Almalinux 8 GPG key

The Almalinux GPG must be updated otherwise all the packages
setup may fail, see [1] for more details.

[1] https://almalinux.org/blog/2023-12-20-almalinux-8-key-update/

Change-Id: I8c5fc5844cc5223d9fc33a1b1b88cf00e5a6060e
diff --git a/almalinux/8/Dockerfile b/almalinux/8/Dockerfile
index 194b47e..1d94df3 100644
--- a/almalinux/8/Dockerfile
+++ b/almalinux/8/Dockerfile
@@ -1,6 +1,9 @@
 FROM almalinux:8.6
 MAINTAINER Gerrit Code Review Community
 
+# Update Almalinux GPG key - see https://almalinux.org/blog/2023-12-20-almalinux-8-key-update/
+RUN rpm --import https://repo.almalinux.org/almalinux/RPM-GPG-KEY-AlmaLinux
+
 # Add Gerrit packages repository
 RUN rpm -i https://gerritforge.com/gerritforge-repo-1-4.noarch.rpm
 
diff --git a/almalinux/8/Dockerfile-dev b/almalinux/8/Dockerfile-dev
index 33ccee3..f2a6203 100644
--- a/almalinux/8/Dockerfile-dev
+++ b/almalinux/8/Dockerfile-dev
@@ -1,6 +1,9 @@
 FROM almalinux:8.6
 MAINTAINER Gerrit Code Review Community
 
+# Update Almalinux GPG key - see https://almalinux.org/blog/2023-12-20-almalinux-8-key-update/
+RUN rpm --import https://repo.almalinux.org/almalinux/RPM-GPG-KEY-AlmaLinux
+
 ARG GERRIT_WAR_URL="https://gerrit-ci.gerritforge.com/view/Gerrit/job/Gerrit-bazel-master/lastSuccessfulBuild/artifact/gerrit/bazel-bin/release.war"
 
 # Allow remote connectivity and sudo and install OpenJDK and Git