win_unzip: overwrite any existing file

lib/ansible/modules/extras/windows/win_unzip.ps1

@@ -61,7 +61,8 @@ If ($ext -eq ".zip" -And $recurse -eq $false) {
         $shell = New-Object -ComObject Shell.Application
         $zipPkg = $shell.NameSpace($src)
         $destPath = $shell.NameSpace($dest)
-        $destPath.CopyHere($zipPkg.Items())
+        # 20 means do not display any dialog (4) and overwrite any file (16)
+        $destPath.CopyHere($zipPkg.Items(), 20)
         $result.changed = $true
     }
     Catch {