docs: update warning formatting in README

Author: IGLADI

README.md

@@ -41,7 +41,8 @@ Pi-DNStack is an automated solution for deploying a containerized DNS management
             -   Other distributions if dependencies are pre-installed
         -   Windows users can use [WSL2](https://docs.microsoft.com/en-us/windows/wsl/install)
 
-> ⚠️ All deployment steps below should be run from your **workstation**, not directly on the target server.  
+> [!WARNING]
+> All deployment steps below should be run from your **workstation**, not directly on the target server.  
 > The script connects to the servers via SSH.  
 > You _can_ use the server as its own workstation if it has PowerShell 7 and SSH access to itself, but that's not the main use case.
 
@@ -76,7 +77,8 @@ Pi-DNStack is an automated solution for deploying a containerized DNS management
     nano main.psd1
     ```
 
-    > ⚠️ At minimum, change the default Pi-hole password in the configuration file!
+    > [!WARNING]
+    > At minimum, change the default Pi-hole password in the configuration file!
 
 4.  **Deploy the Stack**
 
@@ -88,7 +90,8 @@ Pi-DNStack is an automated solution for deploying a containerized DNS management
 
     After deployment, access the Pi-hole web interface at: `http://<server-ip>:<port>/admin/login.php`, [configure your clients](https://www.windowscentral.com/how-change-your-pcs-dns-settings-windows-10#:~:text=HOW%20TO%20CHANGE%20DNS%20SETTINGS%20USING%20SETTINGS%20ON%20WINDOWS%2010) to use Pi-DNStack as DNS server and enjoy your new DNS management stack!
 
-    > ⚠️ Clients must be able to reach your server on port 53 (DNS).  
+    > [!WARNING]
+    > Clients must be able to reach your server on port 53 (DNS).  
     > Firewalls or network rules may block this: [How to open port 53](https://www.cyberciti.biz/faq/howto-open-dns-port-53-using-ufw-ubuntu-debian/)  
     > To confirm it's working, check if your clients show up in the Pi-hole dashboard.