Update registry.k8s.io/sig-storage/snapshot-controller Docker tag to v8.4.0 (#1879)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| registry.k8s.io/sig-storage/snapshot-controller | minor | `v8.3.0` -> `v8.4.0` |

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Reviewed-on: #1879
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Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/storage/snapshot-controller/values.yaml

@@ -6,7 +6,7 @@ snapshot-controller:
       leaderElectionNamespace: snapshot-controller
     image:
       repository: registry.k8s.io/sig-storage/snapshot-controller
-      tag: v8.3.0
+      tag: v8.4.0
     resources:
       requests:
         cpu: 50m