remove cs8 and cs9 from docker image list

docs/dockerimages.md

@@ -10,8 +10,6 @@ The following names correspond to the latest base images
 
 * [AlmaLinux 9](/almalinux/alma9/): `gitlab-registry.cern.ch/linuxsupport/alma9-base`
 * [AlmaLinux 8](/almalinux/alma8/): `gitlab-registry.cern.ch/linuxsupport/alma8-base`
-* [CentOS Stream 9](/centos9/): `gitlab-registry.cern.ch/linuxsupport/cs9-base`
-* [CentOS Stream 8](/centos8/): `gitlab-registry.cern.ch/linuxsupport/cs8-base`
 * [CERN CentOS 7](/centos7/): `gitlab-registry.cern.ch/linuxsupport/cc7-base`
 
 ## CERN's DockerHub page
@@ -20,8 +18,6 @@ The following names correspond to the latest base images
 
 * [AlmaLinux 9](/almalinux/alma9/): `cern/alma9-base`
 * [AlmaLinux 8](/almalinux/alma8/): `cern/alma8-base`
-* [CentOS Stream 9](/centos9/): `cern/cs9-base`
-* [CentOS Stream 8](/centos8/): `cern/cs8-base`
 * [CERN CentOS 7](/centos7/): `cern/cc7-base`
 
 ## Use
@@ -29,7 +25,7 @@ The following names correspond to the latest base images
 You can use the previous images as in the following example:
 
 ```bash
-docker pull gitlab-registry.cern.ch/linuxsupport/cs8-base
+docker pull gitlab-registry.cern.ch/linuxsupport/alma9-base
 # or
-docker pull cern/cs8-base:latest
+docker pull cern/alma9-base:latest
 ```