chore(container): update oci-image xwiki to 28f8fab by renovate (#27806)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| xwiki | digest | `e4568fc` -> `28f8fab` |

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charts/stable/xwiki/Chart.yaml

@@ -33,4 +33,4 @@ sources:
   - https://github.com/xwiki/xwiki-docker
   - https://hub.docker.com/_/xwiki
 type: application
-version: 14.6.6
+version: 14.6.7

charts/stable/xwiki/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: xwiki
-  tag: 16.8.0-postgres-tomcat@sha256:e4568fc5e42e93676a628d7b7e50b3121409e2f9257e52da1d517146f6f615d9
+  tag: 16.8.0-postgres-tomcat@sha256:28f8fabd935d9c7da43f3091625cd5aa6af105772dacd82752a8acb3db8008a4
   pullPolicy: IfNotPresent
 service:
   main: