Update Download-WinRMConfigScript.ps1 to version 1.2.0, modifying exit behavior to prevent closing the PowerShell window when run via "irm | iex".

ConfigWinRMForZabbix/Download-WinRMConfigScript.ps1

@@ -36,11 +36,13 @@
 .NOTES
     Author:   Petr Štěpán
     Created:  2026-07-21
-    Version:  1.1.0
+    Version:  1.2.0
     Changelog:
         1.0.0 - Initial version
         1.1.0 - Added $env:ZabbixProxyIPAddress fallback so a plain "irm | iex"
                 one-liner can supply the IP address without "& { ... } -Param" wrapping
+        1.2.0 - Only call exit when running as a real .ps1 file, not when run via
+                "irm | iex" - exit would otherwise close the caller's PowerShell window
 #>
 
 [CmdletBinding()]
@@ -181,7 +183,16 @@ try {
 }
 catch {
     Write-Error "Script failed: $_"
+    # $MyInvocation.MyCommand.Path is only set when this runs as an actual .ps1 file.
+    # When run via "irm <url> | iex" there is no backing file - the code executes in
+    # the caller's own session, so calling exit here would close their whole
+    # PowerShell window instead of just ending this script.
+    if ($MyInvocation.MyCommand.Path) {
         exit 1
     }
+    return
+}
 
+if ($MyInvocation.MyCommand.Path) {
     exit 0
+}