ci: dispatch website rebuild on release-branch doc changes (drop push-based sync)

.github/workflows/notify-site-rebuild.yml

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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Ask the website to rebuild when release-branch docs change.
+#
+# The website (apache/incubator-texera-site) no longer stores docs in-tree.
+# Its build pulls each release's docs/ folder straight from this repo's
+# release/vX.Y branches at Hugo build time (scripts/sync-docs.sh). This repo
+# therefore does not push any docs; it only needs to nudge the site to rebuild
+# so a docs edit becomes visible without waiting for the next unrelated site
+# commit.
+#
+# This fires the site's existing "Build & Publish Hugo site" workflow via its
+# workflow_dispatch trigger, targeting the staging branch (the staged site).
+#
+# Requires a secret SITE_DISPATCH_TOKEN with Actions: write on
+# apache/incubator-texera-site (a fine-grained PAT scoped to that repo, or a
+# classic PAT with the workflow scope). The ping is best-effort and never fails
+# the workflow.
+
+name: Notify website to rebuild docs
+
+on:
+  push:
+    branches:
+      - 'release/v*'
+    paths:
+      - 'docs/**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: notify-site-rebuild
+  cancel-in-progress: false
+
+jobs:
+  notify:
+    # Only the canonical repo holds the token; skip on forks.
+    if: github.repository == 'apache/texera'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger the site's publish workflow (staging)
+        continue-on-error: true
+        env:
+          GH_TOKEN: ${{ secrets.SITE_DISPATCH_TOKEN }}
+        run: |
+          gh workflow run publish-site.yml \
+            --repo apache/incubator-texera-site \
+            --ref staging