- Kubeadm: fixes a preflight check that can fail hostname construction in IPV6 setups ([#134589](https://github.com/kubernetes/kubernetes/pull/134589), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Auth, Cloud Provider, Cluster Lifecycle and Testing]

      <!-- TODO: Add matches for the other possible XML encoding schemes -->
    </magic>
    <!-- XML files can start with a comment but then must not contain processing instructions.
         This should be rare so we assign lower priority here. Priority is also lower than text/html magics
         for them to be preferred for HTML starting with comment.-->
    <magic priority="30">

TC=n,d._l=t,d._i=e,d._f=a,d._strict=s,(r=new k(la(ba(d))))._nextDay&&(r.add(1,"d"),r._nextDay=void 0),r}function Ha(e,a,t,s){return Sa(e,a,t,s,!1)}M.createFromInputFallback=t("value provided is not in a recognized RFC2822 or ISO format. moment construction falls back to js Date(), which is not reliable across all browsers and versions. Non RFC2822/ISO date formats are discouraged. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info.",function(e){e._d=new Date(e._i+(e._useUTC?"...

- Kubeadm: fix a bug when using external CA mode and trying to upgrade to 1.29 using "kubeadm upgrade apply". Show a warning that kubeadm cannot sign the new "super-admin.conf" as the host does not have a CA and show some instructions on how to manually migrate to the separate "admin.conf" and "super-admin.conf" kubeconfig files. ([#124682](https://github.com/kubernetes/kubernetes/pull/124682), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

- Kubeadm: fixes a preflight check that can fail hostname construction in IPV6 setups ([#134592](https://github.com/kubernetes/kubernetes/pull/134592), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Auth, Cloud Provider, Cluster Lifecycle and Testing]

### Other (Cleanup or Flake)