Change the default livenessProbe endpoint to `/health`

Currently the default `livenessProbe` endpoint is `/health/node-state`. It should actually be `/health`.

The change is trivial, but before applying it we need to double check that it does not break rolling upgrade and scaling down.

Inspect the Helm chart configuration that defines the default livenessProbe endpoint. Verify that changing the endpoint from /health/node-state to /health does not break rolling upgrades or scaling down, then confirm the default is /health and those workflows still succeed.

Written by the indexing model from the issue text.