add non normative section about type change

Signed-off-by: ChrsMark <[email protected]>

docs/non-normative/k8s-migration.md

@@ -43,6 +43,8 @@ and one for disabling the old schema called `semconv.k8s.disableLegacy`. Then:
 
 - [Summary of changes](#summary-of-changes)
   - [K8s network metrics](#k8s-network-metrics)
+  - [K8s Job metrics](#k8s-job-metrics)
+  - [K8s Cronjob metrics](#k8s-cronjob-metrics)
 
 <!-- tocstop -->
 
@@ -66,3 +68,40 @@ The changes in their attributes are the following:
 | `interface`                                                                        | `network.interface.name`  |
 | `direction`                                                                        | `network.io.direction` |
 <!-- prettier-ignore-end -->
+
+### K8s Job metrics
+
+The K8s Job metrics implemented by the Collector and specifically the
+[k8scluster](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/v0.115.0/receiver/k8sclusterreceiver/documentation.md)
+receiver were introduced as semantic conventions in
+[#1649](https://github.com/open-telemetry/semantic-conventions/pull/1660) (TODO: replace with SemConv version once
+available).
+
+The changes in their metric types are the following:
+
+<!-- prettier-ignore-start -->
+
+| Old (Collector) ![changed](https://img.shields.io/badge/changed-orange?style=flat) | New                                    |
+|----------------------------------------------------------|----------------------------------------|
+| `k8s.job.active_pods`                  (type: `gauge`) | `k8s.job.active_pods` (type: `updowncounter`) |
+| `k8s.job.failed_pods`                  (type: `gauge`) | `k8s.job.failed_pods` (type: `updowncounter`) |
+| `k8s.job.desired_successful_pods`                       (type: `gauge`) | `k8s.job.desired_successful_pods`  (type: `updowncounter`) |
+| `k8s.job.max_parallel_pods`                      (type: `gauge`) | `k8s.job.max_parallel_pods`   (type: `updowncounter`) |
+
+### K8s Cronjob metrics
+
+The K8s Cronjob metrics implemented by the Collector and specifically the
+[k8scluster](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/v0.115.0/receiver/k8sclusterreceiver/documentation.md)
+receiver were introduced as semantic conventions in
+[#1649](https://github.com/open-telemetry/semantic-conventions/pull/1660) (TODO: replace with SemConv version once
+available).
+
+The changes in their metric types are the following:
+
+<!-- prettier-ignore-start -->
+
+| Old (Collector) ![changed](https://img.shields.io/badge/changed-orange?style=flat) | New                            |
+|--------------------------------------------------|--------------------------------|
+| `k8s.cronjob.active_jobs`                  (type: `gauge`) | `k8s.cronjob.active_jobs` (type: `updowncounter`) |
+
+<!-- prettier-ignore-end -->