Fix danger alert (#35443)

Co-authored-by: Alex Nguyen <[email protected]>

Author: akordowski

content/admin/monitoring-and-managing-your-instance/configuring-clustering/monitoring-the-health-of-your-cluster.md

@@ -76,11 +76,8 @@ You can configure [Nagios](https://www.nagios.org/) to monitor {% data variables
    > Your public key has been saved in /home/nagiosuser/.ssh/id_ed25519.pub.
    ```
 
-   {% danger %}
-
-   **Security Warning:** An SSH key without a passphrase can pose a security risk if authorized for full access to a host. Limit this key's authorization to a single read-only command.
-
-   {% enddanger %}
+   > [!CAUTION]
+   > An SSH key without a passphrase can pose a security risk if authorized for full access to a host. Limit this key's authorization to a single read-only command.
 
    > [!NOTE]
    > If you're using a distribution of Linux that doesn't support the Ed25519 algorithm, use the command:

data/reusables/enterprise_clustering/proxy_xff_firewall_warning.md

@@ -1,5 +1,2 @@
-{% danger %}
-
-**Security Warning:** When either PROXY support or HTTP forwarding is enabled, it is critical that no external traffic can directly reach the {% data variables.product.prodname_ghe_server %} appliances. If external traffic is not properly blocked, the source IP addresses can be forged.
-
-{% enddanger %}
+> [!CAUTION]
+> When either PROXY support or HTTP forwarding is enabled, it is critical that no external traffic can directly reach the {% data variables.product.prodname_ghe_server %} appliances. If external traffic is not properly blocked, the source IP addresses can be forged.