Auto update config files workflow

This adds a workflow that runs daily to update the config files. It
simply runs `./updateConfigs.sh` and commits the changes directly to
`main`.

.github/workflows/update.yml

@@ -0,0 +1,22 @@
+name: update config files
+
+on:
+  workflow_call:
+  schedule: # run script every day
+    - cron: "0 0 * * *"
+
+permissions:
+  contents: write
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - run: |
+          ./openvpn/updateConfigs.sh
+      - uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: Update config files