chore(deps): update container image ghcr.io/open-webui/open-webui to latest@8473e8b by renovate (#21175)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/open-webui/open-webui | digest | `4c61476` -> `8473e8b` |

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This PR has been generated by [Renovate
Bot](https://togithub.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zMTguMCIsInVwZGF0ZWRJblZlciI6IjM3LjMxOC4wIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInVwZGF0ZS9kb2NrZXIvZ2VuZXJhbC9ub24tbWFqb3IiXX0=-->

charts/stable/ollama/Chart.yaml

@@ -36,4 +36,4 @@ sources:
   - https://hub.docker.com/r/ollama/ollama
   - https://ghcr.io/open-webui/open-webui
 type: application
-version: 5.4.22
+version: 5.4.23

charts/stable/ollama/values.yaml

@@ -9,7 +9,7 @@ rocmImage:
 uiImage:
   repository: ghcr.io/open-webui/open-webui
   pullPolicy: IfNotPresent
-  tag: latest@sha256:4c61476984ab62ea1d422775725e3efb859b352e4fd8bb81c6587e591143cc73
+  tag: latest@sha256:8473e8b6f79a40adf434ecf0fa911bf2b052267646cdde7cae727685efc2de4e
 
 securityContext:
   container: