Merge pull request #7 from PelicanPlatform/haoming29-allow-manual-sub…

…module-update

Add manual dispatch to update-submodules GHA

.github/workflows/update-submodules.yml

@@ -2,6 +2,9 @@ name: Update Submodules
 on:
   schedule:
     - cron: '*/15 * * * *'
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
 
 permissions: write-all