chore(deps): update sealed-secrets docker tag to v2.4.8

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

Author: renovate[bot]

gitops/argocd/charts/secrets/sealed-secrets/Chart.yaml

@@ -23,4 +23,4 @@ appVersion: 1.0.0
 dependencies:
 - name: sealed-secrets
   repository: oci://registry-1.docker.io/bitnamicharts
-  version: 2.4.0
+  version: 2.4.8