Rename powershell command

scripts/Windows/Software/RetroArch/Manage.ps1

@@ -4,7 +4,7 @@ $null = New-Module {
     $path = "C:/tools/RetroArch-Win64";
     $softwareName = "RetroArch";
 
-    function Invoke-BackupRetroArch([Context] $context) {
+    function Backup-RetroArch([Context] $context) {
         $context.Backup($path, $context.SoftwareArchive($softwareName), @("-i@`"$PSScriptRoot/include.txt`""));
     }
 }