Add links to Kubernetes docs about Linux and Windows requirements, and update text.

Signed-off-by: Daniel Lipovetsky <[email protected]>

Author: dlipovetsky

content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md

@@ -48,27 +48,30 @@ that provides the expected symbols.
 * The kubeadm project supports LTS kernels. See [List of LTS kernels](https://www.kernel.org/category/releases.html).
 * You can get the kernel version using the command `uname -r`
 
+For more information, see [Linux Kernel Requirements](/docs/reference/node/kernel-version-requirements/).
+
 {{% /tab %}}
 
 {{% tab name="Windows" %}}
 
 * The kubeadm project supports recent kernel versions. For a list of recent kernels, see [Windows Server Release Information](https://learn.microsoft.com/en-us/windows/release-health/windows-server-release-info).
 * You can get the kernel version (also called the OS version) using the command `systeminfo`
 
-For more information, see See [Adding Windows Nodes](/docs/tasks/administer-cluster/kubeadm/adding-windows-nodes/#before-you-begin).
+For more information, see [Windows OS version compatibility](/docs/concepts/windows/intro/#windows-os-version-support).
 
 {{% /tab %}}
 {{< /tabs >}}
 
 A Kubernetes cluster created by kubeadm depends on software that use kernel features.
-This software includes, but is not limited to, the
-{{< glossary_tooltip text="container runtime" term_id="container-runtime" >}}, the kubelet, 
-and a network (CNI) plugin.
-The software depends on specific kernel features, but does not typically publish a list of these features. Often, the software requires a range of kernel versions.
-To make sure this software runs successfully, kubeadm also requires a range of kernel versions.
-
-To help you avoid unexpected errors as a result of an unsupported kernel version, kubeadm runs the `SystemVerification` pre-flight check.
-This check fails if the kernel version is not supported. You may choose to skip the check, if you know that your kernel provides the required features, even though kubeadm does not support its version.
+This software includes, but is not limited to the
+{{< glossary_tooltip text="container runtime" term_id="container-runtime" >}},
+the {{< glossary_tooltip term_id="kubelet" text="kubelet">}}, and a {{< glossary_tooltip text="Container Network Interface" term_id="cni" >}} plugin.
+
+To help you avoid unexpected errors as a result of an unsupported kernel version, kubeadm runs the `SystemVerification`
+pre-flight check. This check fails if the kernel version is not supported.
+
+You may choose to skip the check, if you know that your kernel
+provides the required features, even though kubeadm does not support its version.
 
 ## Verify the MAC address and product_uuid are unique for every node {#verify-mac-address}