Trigger publish of main site from spec repo

.github/workflows/publish.yml

@@ -0,0 +1,27 @@
+name: "Trigger site publish"
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+concurrency:
+  group: github-pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Trigger creator-assertions.github.io publish
+      uses: actions/github-script@v7
+      with:
+        github-token: ${{ secrets.PUBLISH_TOKEN }}
+        script: |
+            await github.rest.actions.createWorkflowDispatch({
+              owner: 'creator-assertions',
+              repo: 'creator-assertions.github.io',
+              workflow_id: 'publish.yml',
+              ref: 'main'
+            })