ci: add submodule update workflow

Author: zombyacoff

.github/workflows/update-submodules.yml

@@ -0,0 +1,28 @@
+name: Update Submodules
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Update Submodules
+        run: |
+          git submodule update --remote --recursive
+
+      - name: Commit and Push
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+          git add .
+          git diff --quiet && git diff --staged --quiet || git commit -m "chore: update submodules to latest"
+          git push