Updated links to vendor specific implementions (kubernetes#14400)

The following links where broken

* AZURE
* GCE
* AWS

In case of GCE I assume it changed to GCP, but please confirm if that is correct.

content/en/docs/concepts/architecture/cloud-controller.md

@@ -226,9 +226,9 @@ The following cloud providers have implemented CCMs:
 
 * [Digital Ocean](https://github.com/digitalocean/digitalocean-cloud-controller-manager)
 * [Oracle](https://github.com/oracle/oci-cloud-controller-manager)
-* [Azure](https://github.com/kubernetes/kubernetes/tree/master/pkg/cloudprovider/providers/azure)
-* [GCE](https://github.com/kubernetes/kubernetes/tree/master/pkg/cloudprovider/providers/gce)
-* [AWS](https://github.com/kubernetes/kubernetes/tree/master/pkg/cloudprovider/providers/aws)
+* [Azure](https://github.com/kubernetes/cloud-provider-azure)
+* [GCP](https://github.com/kubernetes/cloud-provider-gcp)
+* [AWS](https://github.com/kubernetes/cloud-provider-aws)
 * [BaiduCloud](https://github.com/baidu/cloud-provider-baiducloud)
 * [Linode](https://github.com/linode/linode-cloud-controller-manager)