- Relaxed API validation to allow pod node selector to be mutable for gated pods (additions only, no deletions or mutations). ([#116161](https://github.com/kubernetes/kubernetes/pull/116161), [@danielvegamyhre](https://github.com/danielvegamyhre))

 it is likely that that selectors will remain immutable after the move to v1.
 You can continue to use code that depends on mutable selectors by calling
 the apps/v1beta1 API in this release, but you should start planning for code
 that does not depend on mutable selectors.

 - Extended Resources are fully-qualified resource names outside the
 `kubernetes.io` domain. Extended Resource quantities must be integers.

- Node affinity, Node selectors, and tolerations are now mutable for Jobs that are suspended and have never been started ([#105479](https://github.com/kubernetes/kubernetes/pull/105479), [@ahg-g](https://github.com/ahg-g))

the kube-controller-manager will be aware of the `volumeAttributesClassName` field of PVC and PV objects. The `volumeAttributesClassName` field is a reference to a VolumeAttributesClass object, which contains a set of key-value pairs that present mutable attributes of the volume. It's forbidden to change the `volumeAttributesClassName` field of a PVC object until the PVC is bound to a PV object. During the binding process, if a PVC has a `volumeAttributesClassName` field set, the controller will only...

  // manually, the requested family is available in the cluster,
  // and ipFamilyPolicy allows it, it will be used; otherwise creation of
  // the service will fail. This field is conditionally mutable: it allows
  // for adding or removing a secondary IP family, but it does not allow
  // changing the primary IP family of the Service. Valid values are "IPv4"