chore(deps): update helm release cert-manager to v1.20.3 (#491)

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

Author: renovate[bot]

gitops/components/cert-manager/resources.yaml

@@ -11,7 +11,7 @@ spec:
   source:
     chart: cert-manager
     repoURL: https://charts.jetstack.io
-    targetRevision: v1.20.2
+    targetRevision: v1.20.3
     helm:
       releaseName: cert-manager
       valuesObject: