Auto-deploy docs site on docs changes (#39)

Add a Pages push trigger for main docs/workflow changes while keeping manual dispatch.
Record the catalog-level workflow change in the root changelog.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 18be4b78-3a83-4cb1-8f77-0b837e1c3076

Author: shmuelie

.github/workflows/pages.yml

@@ -1,6 +1,11 @@
 name: Deploy documentation
 
 on:
+  push:
+    branches: [main]
+    paths:
+      - 'docs/**'
+      - '.github/workflows/pages.yml'
   workflow_dispatch:
 
 permissions:

CHANGELOG.md

@@ -7,6 +7,7 @@ between releases this file tracks catalog-level changes under `[Unreleased]`.
 ## [Unreleased]
 
 ### Added
+- GitHub Pages documentation workflow now redeploys automatically when docs or its workflow change.
 - Pester v5 unit test suite under `tests/`, a `build/Invoke-Tests.ps1` runner,
   and CI wiring (`ci.yml` plus a gate in `publish-module.yml`) so behavioral
   tests of exported functions run alongside `Test-Modules.ps1`. Coverage