feat(helm): update chart cert-manager ( v1.20.3 → v1.21.0 )

| datasource | package      | from    | to      |
| ---------- | ------------ | ------- | ------- |
| helm       | cert-manager | v1.20.3 | v1.21.0 |

Author: renovate[bot]

kubernetes/core/cert-manager/helm-release.yml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: cert-manager
-      version: v1.20.3
+      version: v1.21.0
       sourceRef:
         kind: HelmRepository
         name: jetstack

kubernetes/hacks/helmfile.d/apps.yml

@@ -34,7 +34,7 @@ releases:
   - name: cert-manager
     namespace: security
     chart: jetstack/cert-manager
-    version: v1.20.3
+    version: v1.21.0
     values: ["../core/cert-manager/values.yml"]
     needs: ["kube-system/coredns"]
   - name: external-secrets