chore(deps): update valkey/valkey docker tag to v9.0.4 (#1591)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

kubernetes/apps/tools/outline/app/helmrelease.yaml

@@ -62,7 +62,7 @@ spec:
           app:
             image:
               repository: valkey/valkey
-              tag: 9.0.3@sha256:3b55fbaa0cd93cf0d9d961f405e4dfcc70efe325e2d84da207a0a8e6d8fde4f9
+              tag: 9.0.4@sha256:8436e10bc65c94886a91d4415b6a6dfa9cb5a306fb3b996e5bb67cd2b4854193
     persistence:
       data:
         enabled: true