feat(container): update image docker.io/valkey/valkey to v8.1.1

| datasource | package                 | from  | to    |
| ---------- | ----------------------- | ----- | ----- |
| docker     | docker.io/valkey/valkey | 8.0.1 | 8.1.1 |
| docker     | docker.io/valkey/valkey | 7.2.5 | 8.1.1 |

Author: renovate[bot]

kubernetes/cluster-0/apps/selfhosted/paperless/app/helmrelease.yaml

@@ -93,7 +93,7 @@ spec:
           redis:
             image:
               repository: docker.io/valkey/valkey
-              tag: 7.2.5
+              tag: 8.1.1
             resources:
               requests:
                 cpu: 5m

kubernetes/cluster-0/apps/selfhosted/searxng/app/helmrelease.yaml

@@ -77,7 +77,7 @@ spec:
           redis:
             image:
               repository: docker.io/valkey/valkey
-              tag: 8.0.1
+              tag: 8.1.1
             args:
               - --save
               - ""