chore(deps): update dependency https://github.com/kubernetes-csi/external-snapshotter to v8.4.0

Author: renovate[bot]

cluster-wide-apps/snapshot-controller-crds.yaml

@@ -8,7 +8,7 @@ spec:
   project: default
   source:
     repoURL: https://github.com/kubernetes-csi/external-snapshotter
-    targetRevision: v8.2.0
+    targetRevision: v8.4.0
     path: client/config/crd
   destination:
     server: https://kubernetes.default.svc

cluster-wide-apps/snapshot-controller.yaml

@@ -8,7 +8,7 @@ spec:
   project: default
   source:
     repoURL: https://github.com/kubernetes-csi/external-snapshotter
-    targetRevision: v8.2.0
+    targetRevision: v8.4.0
     path: deploy/kubernetes/snapshot-controller
   destination:
     server: https://kubernetes.default.svc