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

Co-authored-by: Tim Bannister <[email protected]>

Author: Kartik Sharma

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

@@ -173,7 +173,8 @@ For more information on version skews, see:
    sudo apt-mark hold kubelet kubeadm kubectl
    ```
 {{< note >}}
-In releases older than Debian 12 and Ubuntu 22.04, /etc/apt/keyrings does not exist by default.
+In releases older than Debian 12 and Ubuntu 22.04, `/etc/apt/keyrings` does not exist by default.
+You can create this directory if you need to, making it world-readable but writeable only by admins.
 {{< /note >}}
 
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