Remove UTF-8 BOM and non-ASCII characters to fix "irm | iex" compatibility; update version to 1.2.3

ConfigWinRMForZabbix/Download-WinRMConfigScript.ps1

@@ -1,4 +1,4 @@
-<#
+<#
 .SYNOPSIS
     Downloads ConfigWinRM.ps1 and ConfigWinRM.xml to C:\WinRM and optionally sets the
     Zabbix Proxy IP address as the WinRM firewall trusted host.
@@ -34,12 +34,14 @@
     first; prompts interactively for the Zabbix Proxy IP address.
 
 .NOTES
-    This file is saved as UTF-8 with BOM because the author name below contains
+    This file is intentionally plain ASCII, no BOM. A UTF-8 BOM broke the primary
-    non-ASCII characters (diacritics) - keep the BOM if this file is re-saved.
+    "irm <url> | iex" use case: the BOM bytes were not decoded correctly across the
+    download pipeline, which made the parser fail to recognize the opening "<#" of
+    this comment block and try to run the whole header as code.
 
-    Author:   Petr Štěpán
+    Author:   Petr Stepan
     Created:  2026-07-21
-    Version:  1.2.2
+    Version:  1.2.3
     Changelog:
         1.0.0 - Initial version
         1.1.0 - Added $env:ZabbixProxyIPAddress fallback so a plain "irm | iex"
@@ -52,6 +54,8 @@
                 SelectSingleNode instead of dot-property access so a missing
                 <FWWinRMTrustedHosts> element is detected cleanly instead of throwing
                 a raw StrictMode error
+        1.2.3 - Removed UTF-8 BOM and non-ASCII characters (broke "irm | iex" -
+                see note above)
 #>
 
 [CmdletBinding()]