Move kube namespace section to the variables one

doc/user/project/integrations/kubernetes.md

@@ -40,13 +40,6 @@ Fill in the service token and namespace according to the values you just got.
 If the API is using a self-signed TLS certificate, you'll also need to include
 the `ca.crt` contents as the `Custom CA bundle`.
 
-## Kubernetes namespace
-
-Kubernetes namespace is auto-generated if not specified.
-The default value is `<project_name>-<project_id>`.
-You can overwrite to use different one, if needed.
-Otherwise `KUBE_NAMESPACE` will receive the default.
-
 ## Deployment variables
 
 The Kubernetes service exposes following
@@ -55,8 +48,12 @@ GitLab CI build environment:
 
 - `KUBE_URL` - equal to the API URL
 - `KUBE_TOKEN`
-- `KUBE_NAMESPACE`
-- `KUBE_CA_PEM_FILE` - only present if a custom CA bundle was specified. Path to a file containing PEM data.
+- `KUBE_NAMESPACE` - The Kubernetes namespace is auto-generated if not specified.
+  The default value is `<project_name>-<project_id>`. You can overwrite it to
+  use different one if needed, otherwise the `KUBE_NAMESPACE` variable will
+  receive the default value.
+- `KUBE_CA_PEM_FILE` - only present if a custom CA bundle was specified. Path
+  to a file containing PEM data.
 - `KUBE_CA_PEM` (deprecated)- only if a custom CA bundle was specified. Raw PEM data.
 
 ## Web terminals