Add the ability to manually test windows workflows

Author: chiedo

.github/workflows/test-windows.yml

@@ -3,6 +3,7 @@
 name: Node.js Tests - Windows
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: "50 19 * * *" # once a day at 19:50 UTC / 11:50 PST