Update kubeadm-upgrade.md (#30135)

* Update kubeadm-upgrade.md

`apt-mark hold` is still required when `apt-get` is used with `--allow-change-held-packages`.

`--allow-change-held-packages` unholds the package but it doesn't pin the new version.

* Add missing changes

* Update kubeadm-upgrade.md

Remove apt >1.1 examples.

Author: ericofusco

content/en/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade.md

@@ -78,10 +78,6 @@ Pick a control plane node that you wish to upgrade first. It must have the `/etc
     apt-mark unhold kubeadm && \
     apt-get update && apt-get install -y kubeadm={{< skew currentVersion >}}.x-00 && \
     apt-mark hold kubeadm
-    -
-    # since apt-get version 1.1 you can also use the following method
-    apt-get update && \
-    apt-get install -y --allow-change-held-packages kubeadm={{< skew currentVersion >}}.x-00
 {{% /tab %}}
 {{% tab name="CentOS, RHEL or Fedora" %}}
     # replace x in {{< skew currentVersion >}}.x-0 with the latest patch version
@@ -175,10 +171,6 @@ Also calling `kubeadm upgrade plan` and upgrading the CNI provider plugin is no
     apt-mark unhold kubelet kubectl && \
     apt-get update && apt-get install -y kubelet={{< skew currentVersion >}}.x-00 kubectl={{< skew currentVersion >}}.x-00 && \
     apt-mark hold kubelet kubectl
-    -
-    # since apt-get version 1.1 you can also use the following method
-    apt-get update && \
-    apt-get install -y --allow-change-held-packages kubelet={{< skew currentVersion >}}.x-00 kubectl={{< skew currentVersion >}}.x-00
 {{% /tab %}}
 {{% tab name="CentOS, RHEL or Fedora" %}}
     # replace x in {{< skew currentVersion >}}.x-0 with the latest patch version
@@ -218,10 +210,6 @@ without compromising the minimum required capacity for running your workloads.
     apt-mark unhold kubeadm && \
     apt-get update && apt-get install -y kubeadm={{< skew currentVersion >}}.x-00 && \
     apt-mark hold kubeadm
-    -
-    # since apt-get version 1.1 you can also use the following method
-    apt-get update && \
-    apt-get install -y --allow-change-held-packages kubeadm={{< skew currentVersion >}}.x-00
 {{% /tab %}}
 {{% tab name="CentOS, RHEL or Fedora" %}}
     # replace x in {{< skew currentVersion >}}.x-0 with the latest patch version
@@ -256,10 +244,6 @@ without compromising the minimum required capacity for running your workloads.
     apt-mark unhold kubelet kubectl && \
     apt-get update && apt-get install -y kubelet={{< skew currentVersion >}}.x-00 kubectl={{< skew currentVersion >}}.x-00 && \
     apt-mark hold kubelet kubectl
-    -
-    # since apt-get version 1.1 you can also use the following method
-    apt-get update && \
-    apt-get install -y --allow-change-held-packages kubelet={{< skew currentVersion >}}.x-00 kubectl={{< skew currentVersion >}}.x-00
 {{% /tab %}}
 {{% tab name="CentOS, RHEL or Fedora" %}}
     # replace x in {{< skew currentVersion >}}.x-0 with the latest patch version