fix invalid link

Author: fredmerci

authentication/Keycloak/README.md

@@ -482,7 +482,7 @@ You can now install the product. We will use the PostgreSQL internal database an
 #### b. Installation using Ingress
 
   Refer to the following documentation to install an NGINX Ingress Controller on:
-  - [Microsoft Azure Kubernetes Service](../../platform/azure/README.md#create-a-nginx-ingress-controller)
+  - [Microsoft Azure Kubernetes Service](../../platform/azure/README-NGINX.md)
   - [Amazon Elastic Kubernetes Service](../../platform/eks/README-NGINX.md)
   - [Google Kubernetes Engine](../../platform/gcloud/README_NGINX.md)