Add missing parameters to updater scripts

scripts/UpdateRepos.ps1

@@ -25,6 +25,8 @@ param(
     [Parameter(Mandatory=$true)]
     [string]$LineupVersion,
     [switch]$NoPush,
+    [string]$GitAuthorName = $null,
+    [string]$GitAuthorEmail = $null,
     [string[]]$GitCommitArgs = @()
 )
 

scripts/UpdateSubmodules.ps1

@@ -16,6 +16,8 @@
 #>
 [cmdletbinding(SupportsShouldProcess = $true)]
 param(
+    [string]$GitAuthorName = $null,
+    [string]$GitAuthorEmail = $null,
     [string[]]$GitCommitArgs = @(),
     [switch]$NoCommit,
     [switch]$Force