Update ubi8 images to ubi9 images (#2973)

Signed-off-by: dkwon17 <[email protected]>

Author: dkwon17

modules/end-user-guide/pages/url-parameter-for-container-image.adoc

@@ -21,4 +21,4 @@ pass:c,a,q[{prod-url}]#__<git_repository_url>__?image=__<container_image_url>__
 ----
 
 .Example
-`pass:c,a,q[{prod-url}]#https://github.com/eclipse-che/che-docs?image=quay.io/devfile/universal-developer-image:ubi8-latest`
+`pass:c,a,q[{prod-url}]#https://github.com/eclipse-che/che-docs?image=quay.io/devfile/universal-developer-image:ubi9-latest`

modules/end-user-guide/partials/proc_creating-workspaces.adoc

@@ -50,7 +50,7 @@ NOTE: {prod-short} administrators who intend to create workspaces for other user
 components:
   - name: tooling-container
     container:
-      image: quay.io/devfile/universal-developer-image:ubi8-latest
+      image: quay.io/devfile/universal-developer-image:ubi9-latest
 ----
 ====
 +
@@ -82,7 +82,7 @@ spec:
     components:#<6>
       - name: tooling-container
         container:
-          image: quay.io/devfile/universal-developer-image:ubi8-latest
+          image: quay.io/devfile/universal-developer-image:ubi9-latest
 ----
 <1> Name of the `DevWorkspace` custom resource. This will be the name of the new workspace.
 <2> User namespace, which is the target {orch-namespace} for the new workspace.