message: Update the customization docs following customer feedback
  This makes the relationship between customization and pods more explicit
diff: @@ -31,6 +31,8 @@ For these to be applied to a resource, these must match the `apiVersion`, `kind`
  Any properties in `metadata.annotations` and `metadata.labels` are then applied to the matching resource(s). These are key/value maps, where both key and value are strings.
  +**IMPORTANT** You cannot directly customize the properties on a `Pod`. Instead, these will inherit the annotation/label customization from its parent (`Deployment`, `DaemonSet`, `StatefulSet`, `Job` etc).
  +
  ### Environment variables
  For environment variables, these must match `metadata.name`. `apiVersion` and `kind` are ignored as these are only implemented on resources with containers.
  @@ -87,7 +89,6 @@ metadata:
  apiVersion: apps/v1
  kind: Deployment
  metadata:
  - creationTimestamp: null
  labels:
  app: gitpod
  component: ws-manager
  @@ -99,6 +100,18 @@ metadata:
  name: ws-manager
  spec:
  template:
  + # The custom annotations/labels are inherited from the Deployment spec
  + metadata:
  + annotations:
  + appliedToAll: value
  + gitpod.io/checksum_config: xxxx
  + hello: ws-manager
  + labels:
  + app: gitpod
  + component: ws-manager
  + appliedToAll: value
  + hello: ws-manager
  + name: ws-manager
  spec:
  containers:
  - env:
  