feat: update calico to v3.21

For people with existing clusters you should be able to upgrade with:

```
kubectl apply -f https://docs.projectcalico.org/archive/v3.21/manifests/tigera-operator.yaml
```

provision/ansible/inventory/group_vars/kubernetes/k3s.yml

@@ -27,7 +27,7 @@ k3s_registration_address: "{{ kubevip_address }}"
 
 # (list) A list of URLs to deploy on the primary control plane. Read notes below.
 k3s_server_manifests_urls:
-  - url: https://docs.projectcalico.org/archive/v3.20/manifests/tigera-operator.yaml
+  - url: https://docs.projectcalico.org/archive/v3.21/manifests/tigera-operator.yaml
     filename: tigera-operator.yaml
 
 # (list) A flat list of templates to deploy on the primary control plane