Add missing linux-firmware package in Rocky Linux 9

Author: cityofships

etc/kayobe/stackhpc-overcloud-dib.yml

@@ -73,6 +73,7 @@ stackhpc_overcloud_dib_packages:
   - "{% if os_distribution == 'ubuntu' %}apt-utils{% endif %}"
   - "{% if os_distribution == 'centos' %}openssh-clients{% endif %}"
   - "{% if os_distribution == 'rocky' %}NetworkManager-config-server{% endif %}"
+  - "{% if os_distribution == 'rocky' %}linux-firmware{% endif %}"
 
 # StackHPC overcloud DIB image block device configuration.
 # This image layout conforms to the CIS partition benchmarks.