update Calico description (#12349)

Update Calico description to add support for Windows, and mention other cloud networking providers supported by Calico policy

content/en/docs/concepts/cluster-administration/networking.md

@@ -288,9 +288,9 @@ at [ovn-kubernetes](https://github.com/openvswitch/ovn-kubernetes).
 
 [Project Calico](http://docs.projectcalico.org/) is an open source container networking provider and network policy engine.
 
-Calico provides a highly scalable networking and network policy solution for connecting Kubernetes pods based on the same IP networking principles as the internet.  Calico can be deployed without encapsulation or overlays to provide high-performance, high-scale data center networking.  Calico also provides fine-grained, intent based network security policy for Kubernetes pods via its distributed firewall.
+Calico provides a highly scalable networking and network policy solution for connecting Kubernetes pods based on the same IP networking principles as the internet, for both Linux (open source) and Windows (proprietary - available from [Tigera](https://www.tigera.io/essentials/)).  Calico can be deployed without encapsulation or overlays to provide high-performance, high-scale data center networking.  Calico also provides fine-grained, intent based network security policy for Kubernetes pods via its distributed firewall.
 
-Calico can also be run in policy enforcement mode in conjunction with other networking solutions such as Flannel, aka [canal](https://github.com/tigera/canal), or native GCE networking.
+Calico can also be run in policy enforcement mode in conjunction with other networking solutions such as Flannel, aka [canal](https://github.com/tigera/canal), or native GCE, AWS or Azure networking.
 
 ### Romana