Update links in documentation (#736)

Author: thegridman

docs/installation/016_install_tanzu.adoc

@@ -10,7 +10,7 @@
 
 == Install On Tanzu
 
-If using https://tanzucommunityedition.io[VMWare Tanzu] the Coherence Operator can be installed as a package.
+If using https://www.vmware.com/products/app-platform/tanzu[VMWare Tanzu] the Coherence Operator can be installed as a package.
 Under the covers, Tanzu uses the https://carvel.dev[Carvel] tool set to deploy packages.
 The Carvel tools can be used outside Tanzu, so the Coherence Operator repo and package images could also be deployed
 using a standalone Carvel https://carvel.dev/kapp-controller/[kapp-controller].

examples/021_deployment/README.adoc

@@ -47,8 +47,8 @@ You can use `kubectl create` for any of the examples to install that one directl
 Ensure you have the following software installed:
 
 * Java 11+ JDK either [OpenJDK](https://adoptopenjdk.net/) or [Oracle JDK](https://www.oracle.com/java/technologies/javase-downloads.html)
-* https://docs.docker.com/install/[Docker] version 17.03+.
-* Access to a Kubernetes v1.14.0+ cluster.
+* A suitable container platform such as Podman or Docker.
+* Access to a Kubernetes cluster running a currently supported Kubernetes version.
 * https://kubernetes.io/docs/tasks/tools/install-kubectl/[kubectl] version matching your Kubernetes cluster.
 
 NOTE: This example requires Java 11+ because it creates a Helidon web application and Helidon requires Java 11+. Coherence and running Coherence in Kubernetes only requires Java 8+.

examples/200_autoscaler/README.adoc

@@ -112,10 +112,10 @@ cd coherence-operator/examples
 
 ==== Prerequisites
 * Java 11+ JDK either https://adoptopenjdk.net/[OpenJDK] or https://www.oracle.com/java/technologies/javase-downloads.html[Oracle JDK]
-* https://docs.docker.com/install/[Docker] version 17.03+.
-* https://kubernetes.io/docs/tasks/tools/install-kubectl/[kubectl] version v1.13.0+ .
-* Access to a Kubernetes v1.14.0+ cluster.
-* https://helm.sh/docs/intro/install/[Helm] version 3.2.4+
+* A suitable container platform such as Podman or Docker.
+* Access to a Kubernetes cluster running a currently supported Kubernetes version.
+* https://kubernetes.io/docs/tasks/tools/install-kubectl/[kubectl].
+* https://helm.sh/docs/intro/install/[Helm].
 
 Building the project requires https://maven.apache.org[Maven] version 3.6.0+.
 The commands below use the Maven Wrapper to run the commands, which will install Maven if it is not