Centralise netlify build trigger (#175)

The netlify build trigger is trivial, but duplicated across many repos.
This should be centralised to subsequently support refactoring to
improve secret usage _in a single place_.

Author: JackPGreen

.github/workflows/build-site.yml

@@ -9,7 +9,6 @@ on:
 
 jobs:
   dispatch:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Trigger build
-      run: curl -d {} https://api.netlify.com/build_hooks/${{ secrets.NETLIFY_BUILD_HOOK_ID }}
+    uses: hazelcast/hz-docs/.github/workflows/build-site-workflow.yml@main
+    secrets:
+      netlify_build_hook_id: ${{ secrets.NETLIFY_BUILD_HOOK_ID }}