chore(helm): update image ghcr.io/open-webui/open-webui digest to 486412e (#30040)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/open-webui/open-webui | digest | `7f44971` -> `486412e` |

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charts/stable/ollama/Chart.yaml

@@ -35,4 +35,4 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/ollama
   - https://hub.docker.com/r/ollama/ollama
 type: application
-version: 7.6.12
+version: 7.6.13

charts/stable/ollama/values.yaml

@@ -9,7 +9,7 @@ rocmImage:
 uiImage:
   repository: ghcr.io/open-webui/open-webui
   pullPolicy: IfNotPresent
-  tag: latest@sha256:7f44971f00b75414ab6222a3be9bc24d5ee604843638f53563f1e7d7992e4363
+  tag: latest@sha256:486412e78f360035322e7efd35d4b7d2f625ee0f74bb58f0b3aed042b9a8070e
 
 securityContext:
   container: