Fix directory name matching pattern.

AutoTx/Resources/Install-NewestPackage.ps1

 $PackageDir = Get-ChildItem -Directory -Name |
-    Where-Object {$_ -match 'build_*'} |
+    Where-Object {$_ -match 'build_[0-9]{4}-[0-9]{2}-[0-9]{2}_'} |
     Select-Object -Last 1
 
 $CurDir = Get-Location