Merge pull request #89551 from mburke5678/mco-ocl-on-example-cp

OCPBUGS:42836 On-cluster layering uses example uses package not in RHEL

Author: mburke5678

modules/coreos-layering-configuring-on.adoc

@@ -56,13 +56,12 @@ spec:
   machineConfigPool:
     name: <mcp_name> <1>
   buildInputs:
-    containerFile: # <2>
+    containerFile: <2>
     - containerfileArch: noarch <3>
       content: |-
         FROM configs AS final <4>
-        RUN dnf install -y cowsay && \
-         dnf clean all && \
-         ostree container commit
+        RUN rpm-ostree install tree && \
+            ostree container commit
     imageBuilder: # <5>
       imageBuilderType: PodImageBuilder
     baseImagePullSecret: # <6>