There is a dead/non-existing link in the MicroProfile Reactive Messaging Kafka quickstart documentation:

https://github.com/wildfly/quickstart/blame/25.0.1.Final/microprofile-reactive-messaging-kafka/README.adoc#L1001

https://github.com/wildfly/quickstart/blame/25.0.1.Final/microprofile-reactive-messaging-kafka/README.adoc#L1037

Non-existing link:

https://docs.openshift.com/container-platform/4.8/cli_reference/helm_cli/getting-started-with-helm-on-openshift-container-platform.html

This link worked just fine for OCP 4.7 version:

https://docs.openshift.com/container-platform/4.7/cli_reference/helm_cli/getting-started-with-helm-on-openshift-container-platform.html

It looks like proper link for OCP 4.8 (and similarly for OCP 4.9) version is a following one:

https://docs.openshift.com/container-platform/4.9/applications/working_with_helm_charts/installing-helm.html