[docs] automatically trigger pages build on gdl-org/docs

.github/workflows/pages_dispatch.yml

@@ -0,0 +1,23 @@
+name: Dispatch GitHub Pages Build
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - "master"
+    paths:
+      - "docs/**"
+
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    steps:
+    - name: dispatch
+      run: >
+        curl -L
+        -X POST
+        -H "Accept: application/vnd.github+json"
+        -H "Authorization: Bearer ${{ secrets.DISPATCH_TOKEN }}"
+        -H "X-GitHub-Api-Version: 2022-11-28"
+        https://api.github.com/repos/gdl-org/docs/actions/workflows/pages.yml/dispatches
+        -d '{"ref":"master"}'